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2015 Fall

Materials and devices for energy and environment applications


Materials and coatings for extreme environments

Intensive development of the most engineering branches from micro- and nanoelectronic and nanobiomedicine till aeronautics, automobile industry, shipping building and space devices is accompanied by formulating of new demands to the wide class of materials and coatings including composite materials and complex structures based on the metals and alloys, oxide and nonoxide ceramics, polymers and various kinds of materials reinforced by micro and nanoparticles and fibers and necessity of their exploitation in severe operation conditions. Severe operating conditions (high and cryogenic temperatures, aggressive environments, complex and alternating-sign loads, thermal cycling, enhanced pressure, microgravitation, vacuum etc,) are determined for every class of materials in separate way (for example, extreme conditions for space materials, materials for nontraditional energy and biomaterials are characterized by various parameters). The aim of symposium is the discussion of main challenges of all kinds of materials , coatings and complex structures for extreme performances with special emphasis on the novel areas of their practical using.




 The need to develop materials which can perform well in severe operating environments is increasing with advances in technology and modern requirements for higher efficiency in all areas such as manufacturing, energy, transport, space, automobile industry and communications, deep-sea technologies etc. Another important driver for advanced functionalities, e.g. self-diagnosis and self-healing, comes from the incorporation of nanoscale and molecular materials components. This poses a major challenge for materials science, and requires a fundamental understanding of how the processing, microstructure, nanostructure and properties of such material interact in order to enhance their response under more severe conditions. The development of new products or components with a step change in efficiency or performance compared to existing ones, for operation in e.g. high radiation environments, highly corrosive environments, under high friction conditions, low temperature environments, deep sea or space environments, or other extreme climate conditions became more actual from year to year.

Last scientific results about investigations of bulk materials, coatings and complex structures that can function within an aggressive environment without property degradation, synthesis of new structures with useful properties will be the key topics of symposium presentations and discussions Special attention will be paid to appropriate numerical tools (e.g. density functional theory, molecular dynamics) to capture the multi-scale evolution of damage (e.g. friction/corrosion or corrosion/irradiation synergies should be considered); and predictive modeling tools for materials operating in extreme environments.

Special time of symposia activity will be devoted to innovative researches, to the questions of technology transfer and international cooperation in the field of advanced materials for extreme environments. One of the main aim of symposium is the organization of open dialog between academicians and researches from one side and representatives of industrial sector from another side to find new possibilities of creation of materials with given complex of performance properties and to determine the new areas of application of such kind of materials.


Hot topics to be covered by the symposium:


  1. Principles of designing of materials and coatings, including various kinds of composite materials for operation in extreme/special conditions.
  2. Scientific fundamentals and computer models for the processes of manufacturing materials and coating, including various kinds of composite materials for operation in extreme/special conditions.
  3. Advanced technologies for production and joining materials and products for exploitation in extreme conditions.
  4. Structure and properties of materials and coatings, including various kinds of composite materials for operation in extreme/special conditions.
  5. Thermal barrier coatings for details and devices for the aerospace industry.
  6. Advanced technologies for recycling of industrial wastes aimed for production of structural, thermal insulating, decorating and other materials.
  7. Technology transfer as a catalyst of innovation development of society.


Tentative list of invited speakers:


  • Shemet V (Jülich, Germany)
  • Tedenac Jean-Claude (Montpelier, France)
  • Dorofeef Vladimir (Novocherkassk, Russian Federation)
  • Brziak Peter (Bratislava, Slovakia)
  • Mileiko Sergey (Moscow, Russian Federation)
  • Prikhna Tatiana (Kiev, Ukraine)
  • Polezhaev Yurii (Moscow, Russian Federation)
  • Savich Vadim (Minsk, Belorus)
  • Gergii Tavadze (Tbilisi, Georgia)
  • Konstantinova Tatiana (Donetsk, Ukraine)
  • Frage Nahum (Bersheva, Israel)
  • Rumyantsev Vladimir (Sankt-Peterburg,Russian Federation)
  • Kervalishvili Paata (Tbilisi,Georgia)
  • Berber Alik (Haifa, Izrael) 


Tentative list of invited speakers:


  • Uvarova Iryna (Kiev, Ukraine)
  • Ragulya Andrey (Kiev, Ukraine)
  • Turkevich Vladimir (Kiev, Ukraine)
  • Ilyushchenko Aleksandr (Minsk, Belorus)
  • Panin Victor (Tomsk, Russian Federation)
  • Kulu Priit (Tallinn, Estonia)
  • Zgalat-Lodzynsky Ostap (Kiev, Ukraine)
  • Gogotsi Yu. (Drexel University, USA)
  • Loboda Petro( Kiev, Ukraine)
  • Hipke Thomas (Chemnitz, Germany)
  • Vishnyakov Leon (Kiev, Ukraine)
  • Pakiela Zbigniew (Warsaw, Poland)
  • Iryna Bilan (Kiev, Ukraine) 
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09:30 Introduction of Organizing Committee ( Iryna Bilan, Valerii Skorokhod, Mikolaj Szafran, Thomas Graule)    
Authors : C. Durif1, C. Frömder1,2, W. Lippmann2, P. Ozog3, D. Kata3 and T. Graule1
Affiliations : 1Empa – Swiss Federal Laboratories for Materials Science and Technology, Laboratory for High Performance Ceramics, Duebendorf, Switzerland.2Technische Universität, Dresden, Germany, 3 AGH Krakow, Poland

Resume : Porous structures based on ceramics have a broad application potential in applications under extreme conditions in the field of lightweight materials in space applications and in thermal insulation at high temperatures and for hot gas filtration. The aim of this current work is to develop a new shaping concept Aquacast for such laminate structure production applying a water based, active curing based system for tape casting. The commonly used system to perform tape casting is an organic media based slurry. Water based system are more eco-friendly and cheap systems compared with organic solvents, but are limited by longer drying times and higher crack sensitivity. In the present work we take advantage of the water based system tape casting technique while minimising the disadvantages such as long time drying or crack formation by using water based UV curable medium. UV curable latex binders used for this study can be defined as a stable colloidal dispersion of polymeric substance in an aqueous medium. Promising results are presented in the preparation of porous gradient structures composed of alumina and zirconia, capable to work as thermal insulating systems at high temperatures and under harsh, corrosive conditions.

Authors : 1-Barbara Romelczyk, 2-Anatolii Laptiev, 2-Oleksandr Tolochyn, 1-Tomasz Brynk, 1-Zbigniew Pakiela
Affiliations : 1- Warsaw University of Technology, Faculty of Materials Science and Engineering, Warsaw, Poland; 2- Frantsevich Institute for Problems of Materials Science of NASU, Kyiv, Ukraine

Resume : For carrying out comparison iron powders from two producers were chosen: coarse powder with a size of particles 25-40 mm (PZh3M2, Ukraine) and fine powder - 2 - 5 mm (DIAFe5000, Germany). Impact sintering of these powders was carried out in vacuum in the range of temperatures of 600-1100 ° C. On samples density, structure and various mechanical properties depending on the impact sintering temperature are determined. As a result of comparison of properties it is established that the absolute density of samples from coarse powder is less than density of samples from fine powder (7.86 versus 7.92 g/cm^3), and specific electrical resistivity of the first samples is higher than resistivity of the second samples (11.4 versus 10.4 mOm´cm) independently of the consolidation temperature. It is connected not so much with the size of initial particles of iron powder, how many with the different content of impurity in powders. In coarse powder the raised content of oxygen, manganese, silicon is revealed. The distinctions of initial powders at a size of particles and in a chemical composition caused various behavior of the compared samples at the mechanical tests and the different mechanical properties. In particular, impact sintering of samples at 700 and 1100 °C led to the following results: tensile ultimate strength of samples from coarse powder equal to 406 and 322 MPa respectively, and the ultimate strength of samples from fine and purer powder equal to 336 and 239 MPa. Such important characteristic of plasticity as contraction was higher at samples from fine powder. Namely, for the samples obtained at 700 and 1100 °C, contraction equal to 78 and 84% for the powder DIAFe versus 26 and 61% for the powder PZh3M2. At the same time, the yield stress is higher at the samples from coarse powder: 352 and 215 MPa versus 189 and 133 MPa for the consolidation temperatures of 700 and 1100 ° C respectively.

10:30 Coffee break    
Authors : Katarzyna Konopka
Affiliations : Warsaw University of Technology, Faculty of Materials Science and Engineering,

Resume : Ceramics with strength, high hardness, chemical inertness, high melting point are a group of materials for demanding applications as automobile industry, aeronautics, high temperature devices as well as biomaterials. However, the brittleness of ceramics limits the work under stress. The ceramic-metal composites are the solution. There are well described mechanisms of improving the fracture toughness. They depends on various microstructural factors as the combination of ceramics and metal, size and distribution of metal particles or new phases and interfaces. In some ceramic-metal system more than one mechanism of improving fracture toughening can operate. Especially, in composites from ZrO2-Ti system the synergy of toughening mechanisms are possible. Zirconia is the transformation-toughened engineering ceramics. In zirconia-titanium composites Ti might have an influence on the transformation of tetragonal ZrO2 into monoclinic. The incorporation of Ti particles can improve the fracture toughening by mechanism of crack deflection or bridging. Moreover, taking into account possible reaction between Ti and ZrO2 various compounds can be formed and also give synergetic effect into the improving the fracture toughening. In the present review paper the mechanisms of improving fracture toughness in ceramic-metal composites will be described and disused in aspect of their domination in composites. The possible synergy of toughening mechanisms will be analyzed. ACKNOWLEDGEMENTS This work was supported by The National Center of Science (NCN), project DEC-2013/11/B/ST8/00309.

Authors : T. Prikhna (1), T. Basyuk (1), O. Ostash (1), S. Dub (1), M. Karpets (1), V. Sverdun (1), M. Moshchil (1), T. Cabioc’h (3), P. Chartier (3), D. Litzkendorf (4), A.Osadchiy (1)
Affiliations : (1) Institute for Superhard Materials of the National Academy of Sciences of Ukraine, 2, Avtozavodskaya Street, Kiev, 04074, Ukraine; (2) Karpenko Physical-Mechanical Institute of the National Academy of Sciences of Ukraine, 5, Naukova str. Lviv, 79060, Ukraine; (3) Universite de Poitiers, CNRS/ Laboratoire PHYMAT, UMR 6630 CNRS Universite de Poitiers SP2MI, BP 30179, F-86962 Chasseneuil Futuroscope Cedex, France; (4) Leibniz Institute of Photonic Technology, Albert-Einstein-Strasse 9, Jena, D07745, Germany

Resume : The established regularities of nanolaminated ternary carbides- and nitrides of (Ti, Nb)-(Al)-(C, N) systems or so-called MAX phases of 312 and 211 types and their solid solutions formation as a result of heating in the wide range of pressures (in vacuum, under 0,1 MPa of Ar, at high (2 GPa) quasihydrostatic pressure, under elevated (30-100 MPa) isostatic and uniaxial pressures) will be under the discussion. The finding correlations between the peculiarities of the materials nanostructures and their properties allowed us to engineer new materials possessing complex of high physical and mechanical characteristics which make them effective as interconnects for hydrogen fuel cells, for manufacturing gliding parts of pantographs, as damping materials for machine building industry, as constructional materials for atomic energetic and air-space industry, as polishing powders for jewelry stones, for manufacturing of nanosorbents for biomedical applications. The results of investigations of structure by X-ray, SEM, Auger analysis and study of microhardness and hardness, fracture toughness, Young modulus, bending and compression strength, coefficient of friction, stability against radiation, influence of hydrogen at room and elevated (600 oC) temperatures, long-term (1000 h) resistance against oxidation at 600oC, electrical conductivity, damping and polishing ability will be considered.

Authors : B. Kalska-Szostko*, U.Wykowska*, D. Satuła#
Affiliations : * Institute of Chemistry, University of Bialystok, Hurtowa 1, 15-399 Białystok, Poland #Department of Physics, University of Bialystok, Ciolkowskiego 1L, 15-245 Białystok, Poland

Resume : Magnetic nanoparticles are widely investigated in many areas, where among others can be strongly emphasized medicine and environment protection [1]. Magnetite in nano form is known as non-toxic and well biodegradable, therefore studies on its stability in nanostructures form become interesting for our team. Therefore, investigations of nanostructures resistance in destructive environments have been performed. For such instance, we have chosen few model solutions: distilled water, acetic acid, citric acid, saline, and ethanol [2]. Magnetite nanoparticles were kept in those solutions for certain time, and then analysis of nanoparticles and the solutions were performed. Particles with modified core or surface layer were compared. Examination of nanoparticles before and after treatment in chosen solutions included TEM, IR, X-ray, and Mössbauer spectroscopy studies. The solutions content after experiment were measured by AAS. As a continuation of this studies, are planned tests of nanoparticles behavior in environmental solutions, for instance wastewater and river water. [1] S. Khizroev, M. Kryder, D. Litvinov, D. Thomson, Appl. Phys. Lett. 81 (2002) 2256 [2] B. Kalska-Szostko, U. Wykowska, K. Piekut, D. Satuła, Colloids and Surfaces A: Physicochemical and Engineering Aspects 450 (2014) 15-24

Authors : Renata Porebska1 , Andrzej Rybak1, Barbara Kozub2, Robert Sekula1
Affiliations : 1-ABB Corporate Research Center, 2-Cracow University of Technology, Faculty of Mechanical Engineering

Resume : The aim of the presented work is an evaluation of wood polymer composites for application in power products. Samples based on polypropylene, polystyrene, polyoxymethylene, acrylonitrile butadiene styrene, polyester resin and polylactic acid with different contents of cellulose fibers were prepared by injection molding process. The mechanical and dielectric properties of these composites were studied in order to check whether investigated wood polymer composites fulfil requirements for their application in power products. For all tested composites a linear increase of modulus with cellulose content was observed. Addition of cellulose to the tested polymers significantly reduces strain at break. In the case of polypropylene and polyoxymethylene composites, the tensile strength increases with the content of the filler. For other materials, there is an inverse relationship, namely addition of cellulose decreases the tensile strength. The electrical strength decrease was observed with increased cellulose content for majority of investigated composites. Polar groups incorporated by cellulose fibers have led to dielectric constant increase. Furthermore, aging of composites in mineral oil and evaluation of water uptake for wood-plastic samples were performed. Wood polymer composites have changed significantly after aging. The water diffusion coefficients were determined and the significant influence of the amount of cellulose on the water absorption was shown.

12:30 Lunch break    
Authors : Mikolaj Szafran, Pawel Falkowski, Emilia Pietrzak, Malgorzata Gluszek
Affiliations : Warsaw University of Technology, Faculty of Chemistry

Resume : Ceramic processing, including shaping of high performance materials and coatings requires new, effectively working processing agents like deflocculants, binders, organic monomers, etc. The results of studies on the application of new water-soluble dispersants and monomers which are then used in the preparation of ceramic colloidal suspensions of high stability and low viscosity. The amphiphilic macromonomers, due to the proper ratio of the hydrophilic to hydrophobic fragments, play the role of not only an internal plasticizer, but they also modify the adhesion of such binders to the ceramic powder particles and substrates. The influence of chemical structure of these copolymers on the properties of ceramics will be discussed. The authors elaborated the synthesis route of acrylic derivatives of saccharides, which have many advantages. They are non toxic, water-soluble, inexpensive and renewable materials. The research showed that the synthesized compounds could play multifunctional role in gelcasting of ceramic powders: organic monomers able to polymerize in situ, compounds forming self cross-linked polymeric network without external additives and dispersing agents for selected nanopowders. These studies were supported by the Polish National Science Centre under Grant No. 2013/11/B/ST8/0029 and Warsaw University of Technology.

Authors : Paulina Wiecinska, Anna Wieclaw, Emilia Pietrzak
Affiliations : Warsaw University of Technology, Faculty of Chemistry, Department of Chemical Technology

Resume : Preparation of advanced ceramic materials and coatings requires the use of various organic additives which facilitate shaping process of non-plastic ceramic powders. The organic substances can play the role of dispersing agents which stabilize suspensions, binders which hold particles together, plasticizers which give elasticity, monomers together which activators and initiators of polymerization which allow to create polymeric network around powder particles. These additives are subsequently burned-out during sintering process. They are indispensible in shaping step but must be then eliminated in order to obtain pure ceramic phase. For this reason the knowledge about thermal degradation of organics used, as well as decomposition products, seems to be very important from the application point of view. The thermal analysis has been done on the apparatus coupled with mass spectrometer what allowed to observe what types of gasses are released to the atmosphere during heating. It was possible to determine at what temperature regions harmful gases like N2O, NO2 or SO2 are released from the organics and which additives can be treated as environmentally friendly. Thermal analysis allowed to determine the stability regions of prepared ceramic samples. The project has been financially supported by the Warsaw University of Technology, Faculty of Chemistry.

Authors : P.Falkowski
Affiliations : Warsaw University of Technology

Resume : In recent years there has been growing demand for microfluidic devices such as ceramic microreactors. The application of ceramic microreactors is expected to have a number of advantages like high heat and mass transfer rate reactions as well as excellent thermal and chemical resistance. Thus, the reaction can be performed under more aggressive conditions with higher yields than it can be achieved with conventional reactors. The ceramic microfluidic devices can be manufactured by combination of tape casting and soft lithography method. In soft lithography and tape casting it is possible to apply the UV curable ceramic dispersion. Such combination allows manufacturing instantly the ceramic material with internal structures such as channels, layer-by-layer without stacking of ceramic tapes and lamination process. In this work a photopolymerization of ceramic dispersions in UV curable monomer was used to manufacture the ceramic microreactor by combination of tape casting and soft lithography technique. The effect of particle size and powder concentration on viscosity, cure depth and relative density were investigated. This work was financially supported by Faculty of Chemistry, Warsaw University of Technology The authors would like to thank BTC Europe GmbH for free samples of Irgacure photoinitiators.

Authors : Agnieszka Antosik, Malgorzata Gluszek, Radoslaw Zurowski, Mikolaj Szafran
Affiliations : Warsaw University of Technology, Faculty of Chemistry, 3 Noakowskiego Str., 00-664 Warsaw, Poland

Resume : Shear thickening fluids belong to the group of non-Newtonian fluids in which viscosity increases with the rate of shear strain. It was shown that under the influence of stroke, dilatant material change the rheological behaviour from liquid to characteristic for solid state behaviour. Initially, the shear thickening behaviour was considered only as a disadvantage of the material. Presence of this kind of fluid in technology often results in hindering of processes of mixing and flow, causing equipment overload. Nevertheless, long years of studies under shear thickening behaviour have shown that potentially undesired feature of this material can find an application in such fields where there is a necessity to dampen and disperse energy eg. dampers, liquid couplings, ski boot cushioning, rotary speed limiters, shock absorber fillings. Nowadays, lot of interest is also focus on the application of shear thickening fluid to the protection of human body. This work was devoted to the research on the optimization of the composition and method of production of shear thickening fluid with high energy absorbing properties as the potential material to the protection of the human body. This work was supported by the National Center for Research and Development (agreement No. PBS1/A5/19/2012).

Affiliations : Jozef Stefan International Postgraduate School Jamova 39, Ljubljana 1000; Institute Jozef Stefan, Jamova 39, Ljubljana 1000 Slovenia

Resume : Polymers are a low cost materials extensively used for laboratory and industrial scale applications. While being applied to a high performance applications, pure polymers lack in their performance level, and their properties are being improved by using a suitable additives into the polymer matrix. One of the important applications of polymer based materials is in the electrical insulation and the fire resisting materials. The measure of electrical insulating properties of any polymeric material have been assessed by means of comparative tracking index (CTI), which is defined as the maximum voltage at which no conductive path formed on the surface after wetting it with 50 drops of 0.1% NH4Cl solution. During the test, the carbonization of the material surface creates a conductive thin layer which allows current to pass through, which results in short circuit and fire. Addition of suitable non-charring, volatile fillers into the matrix improves the CTI performance level by reducing the amount of condensed char formation during the tests. However in the industrial scale production, the use of expensive fillers in large quantities in order to increase efficiency of insulating polymeric materials is major disadvantage. On top of this, the presence of such fillers not necessary gives desired insulating effects, since the persisting surface layer of polymer has typically a negative impact on the CTI performance. To overcome this disadvantage, we demonstrated a new method for surface modification of insulating glass filled polyphenol-matrix composites by selective plasma etching. The principle of selective etching is based on the preferential etching of various materials due to their chemical stability towards the energetic species inside plasma. By means of highly dissociated plasma, the surface polymer is etched away and reformed into volatile gaseous molecules including CO, CO2, H2O, etc. After the processing, the surface carbon content displayed a drastic decrease, whereas tracking performance level increased by 1.7-times. This is attributed to the exposure of the glass fibers on to the surface after the removal of the thin carbon layer representing polymer. Selective etching was performed by a low pressure (<100 Pa) inductively coupled plasma. To improve the etching efficiency of the plasma, various gas composition and discharge parameters were used. Detailed research revealed that the tracking properties are directly correlated with the surface carbon content. To evaluate the etching mechanisms, plasma was characterized by optical emission spectroscopy (OES) and various probe measurements. The etching efficiency was directly correlated with the amount of dissociated species in plasma and the surface temperature during the treatment process. Another interesting observation was that the tracking performance was directly proportional to the amount of inorganic additives embedded inside the matrix.

15:30 Coffee break    
Authors : I. Levchuk (1,2), L. Chepyga (1,2), A. Osvet (1), A. Stiegelschmitt (1) , A. Hashemi (2,3), G. Jovicic (1,2), A. Vetter (1,2) , M. Batentschuk (1), A. Winnacker (1), and C. J Brabec (1,3)
Affiliations : 1- Friedrich Alexander Universität Erlangen-Nürnberg, Dept. of Material Science, i-MEET, Germany; 2- Energie Campus Nürnberg, Germany; 3- Bavarian Center of Applied Energy Research (ZAE-Bayern), Erlangen, Germany

Resume : The most widespread method for non-contact measurement of surface temperature is optical pyrometry, mainly due to the fact that surface stays undisturbed and there is no upper measurement limit. Still, the emissivity of the investigated object is the critical parameter for accurate measurements including the sensitivity to radiation of surrounding objects or stray light. Considering surface temperature measurement of solar cells, presence of the glass protection affects the result. In this case, the phosphor thermometry is a preferred method on account of its high accuracy. The method relies on application of thermographic phosphor materials which consist of a host material doped with active ions. When exposed to e.g. ultraviolet light they emit radiation which strongly depends on the temperature. Use of nanocrystal colloidal solution allows covering surfaces with different shape, structure and roughness by spraying or printing. The precisely implemented spots of the luminescent materials do not disturb the emissivity of the surface. We used a lanthanide phosphate material with a melting point at 2072°C. This is a lanthanum element with a low market price, which makes it attractive for large scale area application. We report the synthesis of LaPO4:Dy3+ nanocrystals and investigation on their temperature sensitivity up to 1200 °C. Bright emission of Dy3+ mainly at 478 nm and 572 nm were detected. The wet chemical synthesis was realized in the high-boiling coordinating solvents tris(ethylhexyl) phosphate at 200°C, using hydrated lanthanide-metal chlorides and crystalline phosphoric acid as starting materials. The synthesis yielded colloids of highly crystalline nanoparticles and a narrow particle size distribution of about 11nm.

Authors : L. Vyshniakov (1), L. Pereselentseva (1), K. Vyshniakova (1), A. Tagliaferro(2), P. Jagdale (2), I. Cannavaro(2)
Affiliations : 1- Frantsevich Institute for Problems of Material Sciences of NAS of Ukraine; 2- Politecnico di Torino, Torino, Italy-10129

Resume : Bio char based carbon and graphene nano structures are very perspective materials for nanoprofiling and modification of polymer composites reinforced by carbon fibers to be used in space, aviation and automotive applications. In this work the materials obtained from pyrolysis and carbonization of pine chips were studied. Techniques such as X-ray diffraction analysis, Raman spectroscopy and transmission electron microscopy were used for structural and morphological characterization of graphite and multilayer graphene nanoparticles that are formed in the 400 to 600° C temperature range On the base of experiment and data analysis, we concluded that the carbonized product of pine chips by pyrolysis consist of two phases, crystalline and amorphous which is confirmed by Raman. Hence this process can be an effective and cheap way to produce graphite and/or graphene nanosheets. The investigations had been supported by FP7 project FIBRALSPEC.

Authors : Vyshiakov L., Do Dic Huen, Vishnyakova K.,Pereselentseva L.
Affiliations : Frantsevich Institute for Problems of Materials Science of national Academy of Sciences of Ukraine

Resume : Peculiarities of production for nanostructured silicon carbide particles prepared by pyrolysis and carbonization of bamboo wood chips preliminary treated with hydrogen peroxide and impregnated with sodium silicate had been investigated. It was determined that due to interaction between pyrolized product and silicon carbide silicon oxide carbide bhad been formed and at the next step it was concerted into nanosized silicon carbide particles at the temperatures 1400 C - 1500 C. Such kind of nanoparticles to be added to the polymer-based composites can essentially enhance the servicve parameters in extreme environments

Authors : I. Bogomol, P. Loboda
Affiliations : National Technical University of Ukraine “Kyiv Polytechnic Institute

Resume : Boron carbide based ceramics are now one of the prospective candidates for the development of new materials for the extreme environments. Recently many scientists use the in-situ eutectic reactions and directional solidification of eutectic alloys for the reinforcing of different type ceramics and significant improving their mechanical properties. Now it is known the increasing in strength was achieved up to 4.5 GPa using these approaches. In our work we were synthesized and characterized B4C-TiB2 eutectic powders. The synthesis was conducted by two routes. First is the mechanical milling of the previously grown directionally solidified B4C-TiB2 eutectic alloy. Second is the centripetal plasma sputtering. Both synthesized powders had the eutectic type structures. The eutectic domain size for mechanically milled powder was same as for used directionally solidified alloys and the particle sizes depend on the intensity of milling process. For the centripetally plasma sputtered B4C-TiB2 eutectic powders the domain size was less than for milled powder due to greater temperature gradient during sputtering process. The particle sizes of the sputtered powders had the wide distribution from 50 to 500 µm. The microstructure and XRD analysis shown that the eutectic powders synthesized by both techniques consist of only two phases B4C and TiB2. The investigation of mechanical properties revealed that Vicker’s hardness and indentation fracture toughness achieved 33,57 GPa and 6.23 MPa m1/2, accordingly. The compression strength of the sputtered powders with particle size of 500 500 µm was on the level of 12.4 GPa. It was concluded that the B4C-TiB2 eutectic powders synthesized by both techniques have a great prospect for production of novel ceramic and cermet materials with improving mechanical properties.

Authors : Mazur V.I., Loboda P.I.
Affiliations : National Technical University of Ukraine “Kyiv Politechnic Institute”

Resume : On the base of direct observation the evolution of grain boundaries at heating of Fe-3% Si (wt.) alloy and existent models of dislocation high-angle boundaries the mechanism of grains coalescence is offered. It is realized as result of turning of crystallographic directions of a grain lattice within the framework of fixed grain boundaries due to running of partial dislocation sub-grain boundaries. Control texture formation during secondary re-crystallization of cold-rolled sheet Fe-3% (wt.) alloy is actual technical and scientific task because is necessary to obtain physical and mechanical properties anisotropy. However many laws of the mechanism and kinetics of re-crystallization processes are debatable. In accordance with some representations, secondary recrystallization turns as result of a growth of small number of grains with orientation {110} . The grains of another orientation are absorbed by growing grains. Second group hypothesis assume that sub-grain boundary can spill and, in result, new big sub-grain is formed. Nonetheless a mechanism of coalescence remained unclear because it must assume the rotation one of two sub-grains crystalline pattern. The sample of cold rolled (ε=70 %) sheet was investigated with thermo-emission electron microscope EF-6 (Carl Zeiss, Jena). A sample was heated by electron beam heater. Temperature was controlled with Pt-PtRh thermocouple. Within low-temperature interval (20 – 730 ᶱC), pictures were formed by secondary electron emission. Above 730 to 900 ᶱC a thermo-emission has been used. It means that crystallographic orientation of grain lattice are established the same. The boundaries between this grain disappeared. One big grain is formed in the frames of four small grains. This grain union happens by coalescence. During heating above 850 to 900 ᶱC re-crystallization appears by classic migration boundary mechanism. Thus the grain growth during secondary re-crystallization is appears by coalescence of some sub-grain and grain. In latest case rotation of crystal lattice is appear due to running grain boundary dislocation with partial Burgers vectors.

Poster session : Prof. Valerii Skorokhod, Prof. Iryna Uvarova
Authors : Iu. Nasieka, V. Strelchuk, Yu. Stubrov, M. Boyko, S. Dudnik, K. Koshevoy, V. Strel?nitskij
Affiliations : Iu. Nasieka, V. Strelchuk, Yu. Stubrov, M. Boyko - V.Ye. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine, 45 Pr. Nauky, Kyiv, 03028, Ukraine S. Dudnik, K. Koshevoy,V. Strel?nitskij - National Science Center ?Kharkov Institute of Physics and Technology?, 1, Akademicheskaya St., Kharkov, 61108, Ukraine

Resume : Up to date, nanocrystalline diamond (NCD) films are regarded as a new material with a high application potential in electronic devices operating in extreme environments. In Ukraine, the works for the synthesis of NCD films are carried out in National Science Center ?Kharkov Institute of Physics and Technology?; here, the deposition method and corresponding setup for diamond films deposition based on the D-C glow discharge in the crossed E/H fields (chemical vapor deposition) were developed. Optical investigation of these diamond materials are performed in V.Ye. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine. The diamond coatings were deposited from the operation mixture CH4/H2 with addition of N2 in various concentrations. It was ascertained that addition of N2 to the operation gas mixture leads to reduction in the sizes of diamond grains as well as to the substantial decrease in the resistivity of the studied films. The electro-physical data are in good agreement with the changes induced by varying the N2 content in the Raman scattering spectra. The increase in the N2 concentration causes significant lowering the crystalline diamond related peak and increase in the intensity of the peaks related to the sp2-bonded carbon. These changes in the spectra indicate significant disordering the structure of the films and can be associated with a decrease in the sizes of diamond crystalline grains and tendency of NCD film to amorphization.

Authors : Yegor Brodnikovskyi, Dmytro Brodnikovskyi, Iryna Brodnikovska, Mykola Brychevskyi, Igor Polishko, Oleksandr Vasylyev
Affiliations : Frantsevich Institute for Problems of Materials Science of NASU, Krzhizhanivsky str. 3, 03680, Kyiv, Ukraine

Resume : Zirconia (zirconium dioxide) is a very perspective material for SOFC anode making due to its good combination of mechanical and electric properties. Despite the widespread use of 8YSZ (8-mol. % Y2O3 – ZrO2) for making of SOFC during a past decade, for today most perspective for low temperature (600-800 °C) composition is considered 10Sc1CeSZ (10 mol.% Sc2O3 - 1 mol.% CeO2 – 89 mol.% ZrO2), as it has higher ionic conductivity. Using ceramic component of increased strength while keeping sufficient ionic conductivity results in enhanced SOFC’s anode efficiency at operating temperatures. The aim of this work was to study the creation patterns of 10Sc1CeSZ – 3.5YSZ (3.5-mol. % Y2O3 – 76.5- mol.% ZrO2) system for application as a ceramic component of the SOFC. For this purpose, the influence of 3.5YSZ content on strength and electrical conductivity of 10Sc1CeSZ –3.5YSZ composite were studied. Methods: SEM, XRD, biaxial bend test, impedance spectroscopy.

Authors : Olena Sych1, Artem Iatsenko2, Lesya Panchenko3, Tamara Tomila1, Yan Evych1
Affiliations : 1Frantsevich Institute for Problems of Materials Science of NAS of Ukraine, Department of Physical-Chemical Foundations of Powder Materials Technology, 3, Krzhyzhanovsky Str., Kyiv 03680, Ukraine 2National Technical University of Ukraine “Kyiv Politechnical Institute”, Department of Ceramics and Glass Chemical Technology, 37 Peremogy Ave., Kyiv 03056, Ukraine 3Institute of Traumatology and Orthopedics of NAS of Ukraine, Laboratory of Immunology, 27, Boulevard-Kudryavskaya Str., Kyiv 01601, Ukraine

Resume : Highly porous ceramics on the basis of biogenic hydroxyapatite (BHA) and glass of the SiO2-CaO-Na2O system have been prepared using a replication techniques for the structure of a polymer template in the temperature range 800–1100 °Ñ. It has been established that decreasing of BHA content from 70 to 50 wt. % leads to the decomposition of BHA and interaction with glass mass, which results in forming such phases as renanit NaCaPO4, calcium silicate phosphate Ca5(PO4)2SiO4, calcium pyrophosphate Ñà2Ð2Î7 and hydroxyapatite Ca5(PO4)3(OH), which was confirmed by IR spectroscopy results. An increase in sintering temperature over 1000 °Ñ causes marked volume shrinkage to 76 % and pore structure transformation from an open into closed type. Samples prepared at 900 °Ñ exhibit optimal structural-mechanical properties. They are characterized by a permeatable structure with a predominant pore size of ~ 125 µm and small volume shrinkage of 9-12 %, which makes it possible to fabricate samples with required shape, size as well as total and open porosity of 78-82 and 76-63 %, respectively, and a compressive strength of 0.9-1.0 ÌPà. Moreover, it was found the significant increase in performance osteogenic activity of stem stromal marrow cells of ilium outside the local foci of inflammation and degenerative lesions of human bone tissue in the presence of glassceramics. The materials obtained are promising for replacement of defective bone tissue in orthopedy and traumatology.

Authors : Marcin Malek1*, Pawel Wisniewski1, Jaroslaw Mizera1, Krzysztof Jan Kurzydlowski1
Affiliations : 1Faculty of Materials Science and Engineering, Warsaw University of Technology, * Corresponding author:

Resume : This work present results of the technological properties of ceramic slurries based on silicon carbide powder. For ceramic slurries preparation SiC F400 powder and binder with nanoparticles of Al2O3 were used. To modification technological parameters two polyacrylic binder were added. Solid content was 62,5 wt.%. Standard industrial parameters like: viscosity, density, temperature and pH were measured every day. For better characterization rheological properties of investigated ceramic slurries dynamic viscosity was done. Tests were taken 96h in laboratory condition. Silicon carbide properties: SEM images, grain size and chemical composition were studied. Obtained results shown that ceramic slurries based on SiC and new polyacrylic binder were stable vs. time and meet the standard industrial requirements. Properties of tested ceramic slurries are promising in further fabrication of ceramic shell moulds. Financial support of Structural Funds in the Operational Programme - Innovative Economy (IE OP) financed from the European Regional Development Fund - Project "Modern material technologies in aerospace industry", No. POIG.01.01.02-00-015/08-00 is gratefully acknowledged.

Authors : J. Szymanska, P. Wisniewski,M. Malek, J. Mizera
Affiliations : Warsaw University of Technology; Faculty of Materials Science and Engineering; Woloska 141 Street; 02-507 Warsaw;

Resume : This work concerns characterization of ceramic proppants applied in hydraulic fracturing during extraction of shale gas. Propping agents pumped with liquid into the deposit cause cracking of the rock. The role of these materials is to avoid closing of formed pores and to enable facilitated gas migration from deposit. Due to processing requirements and conditions in formations (high pressure and temperature), proppants should be characterized by proper physico- mechanical properties. The investigation relates to properties of five kinds of proppants obtained by the mechanical granulation method. Bulk density, roundness coefficient, porosity, pores size distribution, moisture content, turbidity and solubility in acid were examined. Mechanical strength of proppants was established during subjection to the crush test at increasing stress. Structure and morphology of ceramic pellets were determined by the Scanning Electron Microscopy (SEM) with Energy Dispersive Spectroscopy (EDS) and X-Ray Tomography. The results indicate that composition, grain size distribution and morphology as well have an important influence on their fundamental properties during shale gas permeability through the fracture. Keywords: ceramic proppants, granulation, raw materials, shale gas, hydraulic fracturing Financial support of BLUE GAS Programme financed from The National Centre for Research and Development Project: “Optimizing the lightweight high strength and low specific gravity ceramic proppants production technology maximally using naturally occurring Polish raw materials and fly ash” , No. BG1/BALTICPROPP/13 is gratefully acknowledged.

Authors : Adamovskyi A.A., Kostenko A.D., Varchenko V.T.
Affiliations : I.Frantsevich Institute for Problems of Materials Science, NAS of Ukraine

Resume : To examine the tribological characteristics of the friction pairs SHM-SHM under dry friction by butt-to-butt scheme. The test objects were production pieces of SHM, i.e. the composites based on the dense modifications of BNsphalerite: composite 01, composite 10, composite 05-IT. The friction pairs were tested by the following regimes: sliding velocity, m/s: 0.1; 0.2; 0.3; load, N: 350; 450; 650; 850; 2100; 3600; dry friction in air. When testing we determined the friction coefficient. The surface roughness of the SHM before the test was Ra = 0.30-0.50 µm. The tribological characteristics of friction pairs of the same superhard materials have been examined. The SHMs exhibited extreme wear resistance in the friction pairs of the same material. The maximum wear resistance under dry sliding showed friction pair composite 10-to- composite 10. In the friction pair composite 05-IT-to- composite 05-IT under sliding speed of 0.1 m/s the decrease in coefficient of friction from 0.40 to 0.06 was observed with increasing load from 350 N to 3600 N. So, an increase in the load by 10.2 times reduced the coefficient of friction by 6.6 times. SHM surface roughness after testing was Ra = 0.15-0.18 µm. The study of friction surfaces showed that the samples were working in the area of elastic deformation. The tested SHMs in friction pairs under dry friction conditions can be ranked as follows with respect to decrease in friction coefficient: composite 01- composite 05-IT - composite 10.

Authors : N.Agoudjil , S.Kermadi , S.Sali , M.Boumaour
Affiliations : 1 - Unite de developpement de la technologie du silicium 2-Laboratoire de physico-chimie des materiaux.

Resume : Sol-Gel Synthesis of thin film coatings Structural and optical study. N.Agoudjil2 , S.Kermadi1 , S.Sali1, M.Boumaour1. 1-Unite de developpement de la technologie du silicium.UDTS.Alger. 2-Laboratoire de physicochimie des matériaux .USTHB .Alger Abstract Due to its large band gap, high transparency in the visible region spectrum, high refractive index, high chemical and mechanical stability, TiO2 has a large variety of potential applications as ceramic membrane antireflective coating in solar cells. Among the various processes for the elaboration of TiO2 thin films, sol-gel method presents many advantages especially in its simplicity:low deposition temperature, high homogeneity and purity for the elaborated materials and large coated surfaces can be achieved. The objective of this study is to provide an antireflective coating which is suitable for application on silicon solar cells, and which has optimum optical properties, such as a low reflectance of incident light within the visual wavelength range and a high bandwidth. Our research were focused on the influence of the sol concentration on the structural and optical properties of dip-coated TiO2 thin films on glass substrates for photovoltaic applications. By sol-gel process, two types of TiO2 thin films were dip-coated on microscopic glass substrates according to the concentration of the solvent ( 2-propanol ) in the sol. The samples treated were characterized by XRD,spectrophotometry, ellipsometry and AFM microscopy in order to observe the influence of the solvent concentration on their sructural and optical properties. The effect of sol concentration was studied.The structural properties were found to be strongly influenced by the amount of the solvent in the sol. A mixture of anatase and rutile structure was found for the films derived from low concentrated sol and an only anatase structure for films derived from high concentrated sol. The AFM observations have shown a uniform topography, porous structure and low roughness for the films prepared by sol with low concentration.The estimated refractive index dispersions were found to be invariant with the number of the coating but increase by increasing sol concentration indicating a dense structure which is in good agreement with AFM observations. The transparency of the films increases with the solvent content. A transmittance above 88% was reached all over the visible spectrum which makes this sol-gel elaborated oxide a good material for photovoltaic applications. TiO2 sol-gel thin films were successfully dip-coated on glass substrates. From this study ,TiO2 elaborated presents the best optical and structural properties for photovoltaic applications as an antireflective coating. Keywords : coatings , sol-gel , optical properties.

Authors : Naidich Yu.V., Durov O.V., Sydorenko T.V., Karpets M.V., Koval O.Yu.
Affiliations : I.Frantsevich Institute for Problems of Materials Science, NAS of Ukraine

Resume : Wetting of titanium dioxide with iron triad metals was considered in the present work. At interaction of iron and cobalt containing melts to rutile additional liquid phases forms. Temperatures if its appearance (1650 K for iron and 2100 K for cobalt) are in good correlation to temperatures of FeO and CoO melting. From the X-ray diffraction and SEM investigation for iron case second liquid is eutectic between titanium dioxide and pseudobrookite (Fe3Ti3O10), for cobalt case second liquid is eutectic between titanium dioxide and some of ternary Ti-Co-O compound. In nickel case second liquid phase is not observed because NiO in vacuum decomposes before melting.

Authors : Takaomi Matsutani*, Kayo Yamasaki*, Tadahiro Kawasaki**
Affiliations : *Faculty of Science and Engineering, Kinki University, 3-4-1 Kowakae, Higashi-osaka, Osaka, Japan; **Nanostructures Research Laboratory, Japan Fine Ceramics Center (JFCC), 2-4-1 Mutsuno, Atsuta-ku, Nagoya, 456-8587, Japan

Resume : An environmental-cell transmission electron microscope (E-TEM) system has been developed to investigate the catalytic behavior between catalysts and reaction gases and examine living biological specimens. The E-TEM system includes a specimen holder with a small chamber that employs a diaphragm to isolate the vacuum needed for TEM observation from the reaction gas around the specimen. The diaphragm is the most important component of the system because it not only maintains the pressure difference between the vacuum and the reaction gas but also allows an electron beam to pass through it. A high-hardness, chemically inert diaphragm made from an amorphous material consisting of a light element is required to minimize the electron scattering and diffraction contrast. The present study investigates the amorphous silicon carbonitride films for the diaphragm of E-TEM prepared by magnetic-field and pulse-plasma-enhanced chemical vapor deposition. Nitridation and desorption of CH3 and NH in the films which were enhanced by increasing of plasma voltage were confirmed by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy. The films were amorphous and transparent at 200 kV was observed by TEM. The increasing of the nitrogen concentration and the decreasing of the hydrogen bonds in the film led to increase the hardness of the film. And also, the life of a-SiCN film under the electron irradiation in the CO + O2 reaction gases became longer (for 30 minutes or more).

Authors : Zhuravlev V.S., Karpets M.V., Koval A. Yu., Naidich Yu.V.
Affiliations : I.M. Frantsevich Institute for Materials Science Problems, NAS of Ukraine

Resume : The Co-Nb-melts are perspective for bonding (brazing) of niobium with oxide materials by TLP (transient-liquid-phase) technology. The wetting and contact interaction of oxide materials (Al2O3-SiO2) with three eutectic Co-Nb melts at 1400-1520 ºС in vacuum 10-3 Pa is studied. It was shown that wetting is improved by increasing Nb content in the melt and the SiO2 in the substrate. Confirmed results of the A.Passerone that the increase of Nb content from 43.2 to 61 at.% in the melt does not lead to improved wetting of sapphire (θ = 91±2 deg.). It was related to the features of changes in surface tension on interface of sol/liqu. The oxides of niobium were found out on the solidified drop in area of contact drop with SiO2-conteining substrate. Contents of the oxygen in them was decreased at the increase of concentration of Nb in a drop (from NbO2 to Co6Nb6O ).

Authors : Naidich Yu.V., Stetsyuk T.V., Sydorenko T.V., Durov O.V., Kostyuk B.D.
Affiliations : I.Frantsevich Institute for Problems of Materials Science, NAS of Ukraine

Resume : In space conditions the electron-beam welding is perspective method to obtain of seams which have good physical and mechanical properties (in weightlessness the molten metal is held in container by surface tension, which generally decreases when the temperature of experiment is increased). For development of new generation of electron-beam emitter the technology of producing of brazed ceramic-metallic joints with complicated design (form) of the ceramic parts was optimized. The samples of high-voltage insulator for electron-beam emitter were produced for work in microgravity. It was proposed a 3th-layers form of the filler (like a "sandwich"): base (Ag, Cu) / titanium / base (Ag, Cu). Work properties of the brazed joints were studied: the tightness (up to 5 atm), the thermal-cycling stability (40 cycles, Т = 770K - 290K - 770K), the cold endurance (up to 198K).

Authors : Olena Poliarus, Oleksandr Umanskyi
Affiliations : Frantsevich Institute for Problems of Materials Science NASU

Resume : Today the problem of protection of various parts for shipbuilding engineering, hydropower equipment, floating oil and gas platforms from the action of aggressive media, including seawater, is very urgent. Therefore the development of composite coatings of the NiTi – MeB2 systems is promising. The intermetallic NiTi is known to preserve high strength, hardness and wear resistance up to 400°C under the conditions of combined cavitation and erosion wear. Additionally, it exhibits high resistance to oxidation and corrosion in alkalis, acids, water and neutral media. The present work is devoted to study of wettability and peculiarities of contact interaction in the NiTi-CrB2 system. The intermetallic NiTi has been shown to wet chromium diboride with formation of wetting angle 10°. The phase and chemical compositions of the products in the interaction zone were analyzed. It was established that the chemical interaction between the initial components results in forming a new phase, namely TiB2. Based on the investigation findings for the contact interaction, chromium diboride was selected as an additive to create a new corrosion resistant composite material on the basis of intermetallic NiTi. The microstructure of the developed composite material of the NiTi-CrB2 system and its behavior in aggressive corrosive media, in particular in seawater, were thoroughly studied.

Authors : Grigorenko M., Chernigovtsev E.
Affiliations : I.Frantsevich Institute for Problems of Materials Science, NAS of Ukraine

Resume : At first stage for a number of contacting model pairs: olive, castor oil - glass, paraffined glass; water – glass; paraffined glass; water/ethanol – glass, paraffined glass wetting studies in the air atmosphere were performed by a sessile drop method. Taking into account wetting data obtained for particular contacting pairs at the second stage wetting and spreading peculiarities were studied in dynamics by video filming for liquid (oil) contacting with solid surface (glass, paraffined glass) immersed in another liquid (water, water-ethanol solution) immiscible with the first one and having density equal to that of said solution (thus imitating microgravity/zero-gravity state) - at liquid1-solid-liquid2 interface. The results obtained - in particular different and rather strongly distinguished degrees of wetting and liquid-solid interface movement velocities for some contacting pairs can have practical application e.g. for modeling and studying the processes of purposeful liquid capillary transportation, liquids separation and purification at microgravity conditions and development of appropriate space technologies.

Authors : Jan Dankowski
Affiliations : The Institute of Nuclear Physics

Resume : Plasma diagnostics as well as all issues around the plasma physics quickly become one of a faster developing part of the science. Progress in fusion plasma diagnostics therein measurements of nuclear radiation become extremely important to solve technical problems for future thermonuclear devices and, consequently, electrical energy production. Detection of so-called “lost alpha particles” is necessary to help in keeping energetic balance in plasma machines such as tokamaks. Knowledge of the escaping alpha particle energy is essential. Alpha particles, produced in fusion reactors, help to maintain the plasma at a proper temperature for the ongoing fusion, and also heat the incoming fuel. Measurement of escaping alpha rates near the first wall is of importance in planning tokamak fusion reactors. Because of a short range of the alpha particles in matter, the detection have to be carried out near the burning plasma in a harsh environment (high radiation intensity and high temperature) which limits the use of certain types of semiconductors as spectrometric detectors. Diamond is an attractive candidate as an alpha detector in these conditions due to good spectrometric properties and temperature resistance. Diamond itself is high temperature resistant (1600 ºC). As the detector it is expected to operate well up to temperature of 200 ºC with a good energy resolution. Studies about diamond detectors as a plasma diagnostics device were conducted in the Institute of Nuclear Physics Polish Academy of Sciences for last several years. Experience in spectrometric measurements of various charged particles produced in D-D and D-T nuclear reactions gives base for studies of thermal resistivity of diamond detectors. Energy spectra in temperature up to 250oC were collected at a 14 MeV pulsed neutron generator where both D-D and D-T reactions are available. During the experiment diamond detectors showed an excellent energy resolution results up to 200oC. An analysis for temperature above 200oC showed a visible signal deformation and the detector polarization appeared. The measurements were done in a vacuum chamber designed and constructed in the IFJ PAN.

Authors : Oleksandr Umanskyi, Olena Poliarus, Maksym Ukrainets, Mykola Brodnikovskyi, Dmytro Brodnikovskyi
Affiliations : Frantsevich Institute for Problems of Materials Science National Academy of Sciences of Ukraine

Resume : NiAl is widely used as oxidation- and corrosion-resistant material. However, application of nickel aluminide as high-temperature structural material is limited because of its poor strength at temperatures above ~480 °C. Armoring of NiAl by refractory borides is reasonable in order to increase the high-temperature strength of intermetallic. The results of previous investigations showed that CrB2 is an optimal reinforcement for the nickel aluminide. In order to establish the influence of chromium diboride additive amount on mechanical properties of the NiAl high-temperature bending strength of NiAl-15 (30, 45) wt.% CrB2 composite materials was determined. Specimens with 35x3x4 mm dimensions were prepared for testing using hot pressing method. The strength was determined by static three-point bending of the obtained samples at room and high (500, 800, 1 000 °C) temperatures. It was shown that the introduction of the CrB2 into intermetallic leads to a significant increase in the strength of NiAl in the 20-900 °C temperature range. The fractured surfaces were investigated and the regularities of developed composite materials fracture were determined using SEM and EDX methods.

Authors : S.I. Sidorenko, S.M. Voloshko, A.P. Burmak
Affiliations : National Technical University of Ukraine «Kiev Polytechnic Institute», Peremogy av.37, Kyiv, 03056, Ukraine

Resume : Regularities in the formation of phase and chemical composition, fine microstructure and mechanical properties of surface layers in D16 aluminum alloy under the UIT in the conditions of quasi-hydrostatic compression of samples in rare gases and liquid nitrogen ambient were studied in this paper. A cyclic character of microhardness change in surface layers of D16 alloy depending on oscillation amplitude of tensions concentrator and time of UIT in an inert environment was revealed, which consists in alternation of work-hardening stages, conditioned by structure and phase transformations, as well as plastification stages due to the development of dissipative processes of dynamic recovering and dynamic recrystallization. Work-hardening (in 2,5 time) of D16 alloy surface by means of UIT in an inert environment is conditioned by modification of dislocation structure, deformation forming of nanocrystal structure, and precipitation of nanosize strengthening S' phases. It is shown the unique possibility of work-hardening of D16 alloy surface (in 5 times) by UIT treatment in the liquid nitrogen ambient, conditioned by synergetic influence of nanostructuring and micro chemical impact processes on aluminum in the process of criodeformation. Cyclic character of changes of micro hardness it is not discovered in this case. The development of dynamic recover processes and the evidences of the dislocation annihilation effect are prevented by deep cooling up to the criotemperatures.

Authors : V.D. Dobrovolsky*, O.G. Ershova, Y.M. Solonin, O.Y. Khyzhun
Affiliations : Frantsevych Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, 3 Krzhyzhanivsky Street, UA-03142 Kyiv, Ukraine

Resume : We report on studies of the process of cyclic hydriding-dehydriding (eight cycles) of mechanical alloy synthesized in a ball mill by grinding powder mixture Mg + 10 % wt. TiH2 + 10 % wt. Fe in argon medium. Hydrogen-sorption properties and thermal stability of the mechanical alloy are studied employing thermodesorption spectroscopy at hydrogen pressure of 0.1 MPa. Hydrogen capacity of the mechanical alloy is determined to be 4.9 % wt., and temperature of the beginning of hydrogen desorption from the alloy under this study equals 220 С. Kinetics of the process of hydrogen desorption from the hydride phases of the mechanical alloy is studied. The present studies have revealed that mechanical treatment in Ar medium of magnesium powder with simultaneous Fe and Ti additives cause a grater effect on improving kinetics of hydrogen desorption from hydride phase MgH2 of the alloy and decreasing its thermal stability in comparison with that caused by mechanical treatment in hydrogen medium of the same powder with either Fe or Ti additives.

Authors : Naidich Yu.V., Sydorenko T.V., Poluyanskaya V.V.
Affiliations : I.Frantsevich Institute for Problems of Materials Science, NAS of Ukraine

Resume : The tin oxide ceramics have specific optical and electrical properties and a good chemical stability. Such ceramics can used in electronics, electrical engineering, electrochemistry, catalysis, biotechnology, metallurgy, atomic and chemical industries, etc. SnO2 belongs to the important class of transparent conductor oxide materials that combine low electrical resistance with high optical transparency in the visible range of the electromagnetic spectrum. These properties are required for optoelectronic applications, light emitting diodes, electrode materials in solar cells flat panel displays, transparent field effect transistors. The reliable electrical contact can be obtained by brazing technology. The wetting joined materials are important for the development of fillers. In this work the wetting of tin oxide ceramic substrate by liquid metals was investigated at high temperatures both in air and in vacuum. The contact angle of pure Ag on surface of tin oxide was 100 degrees in air and 110 degrees in vacuum. Addition of Cu to Ag-melt in air leads to fall in the wetting angle (up to 14 degrees for alloy with 40 at.% Cu) and to raise of the contact angle (up to 120 degrees for same alloy) in vacuum. The microstructure of the transition zone of metal/ceramic interface was studied. The comparison of the wetting in air of tin oxide and other “classic” oxides was carried out.

Authors : P. Łada, A. Miazga, J. Woźniak, K. Konopka, A. Olszyna
Affiliations : Warsaw University of Technology, Faculty of Materials Science and Engineering

Resume : Zirconium oxide stabilized by 3 mol.% yttrium oxide is one of the ceramics materials which is using to dental applications, thermal barrier coatings or as a cutting tool material. The properties of this ceramics include high flexural strength, high fracture toughness, high hardness, wear resistance, low thermal conductivity and corrosion resistance in acid and alkalis. One of the method to change the proprieties of zirconium oxide is incorporating a second-phase reinforcement into ceramics matrix. Titanium is a metal which have a wide application including aerospace, automotive, biomedical and chemical industry. The main proprieties of titanium are high strength-to-weight ratio, excellent corrosion resistance, biocompatibility and low mass-to-volume ratio. The combination of these two materials should create a composite which exhibits enhanced mechanical and thermal properties than the two participating components. This work shows the preliminary analysis of composite from the ZrO2 ? Ti system. The samples were prepared from the nano-size ZrO2 powder stabilized by 3%mol Y2O3 and 10% by volume Ti powder with particle size about 15?m. The samples were formed by spark plasma sintering (SPS). The parameters of SPS process was: in temperature 1350?C, with pressure 20MPa and time 10min, with a heating rate of 100?C/min. All process was lead in an inert atmosphere, in argon. The densities of the green body and sintered ZrO2-Ti composites were determined by Archimedes method. The microstructural characterization was carried out using an x-ray diffraction and a scanning electron microscope (SEM) with EDS analysis. Additionally, the Vickers hardness and fracture toughness were measured. Obtained composite samples have a density about 98-99% of theoretical value. During the process was used a graphite die which can react with mixing powder and in effect, on the surface of samples can appear new compounds like TiC. The SEM observation and EDS analysis confirmed that the Zr and Ti are distributed homogenously in analyzed areas. Moreover, the x-ray diffraction reveal the existence of a new phase Ti2ZrO. Keywords Zirconium oxide, titanium, spark plasma sintering (SPS), composite, cermets Acklowledgements The work was done in frame of the project financed by National Center of Science (NCN), project DEC-2013/11/B/ST8/00309.

Authors : Svetlana Chernega, Igor Poliakov, Mihael Krasovskiy
Affiliations : National Technical University of Ukraine "Kiev Polytechnic Institute", Kiev Institute for Problems in Materials Science (IPMS) NAS of Ukraine

Resume : In this paper investigated the structure and phase composition of boron coatings obtained after complex saturation with boron and copper low-carbon steels at applying an external magnetic field (EMF). This method obtaining boron coating allows in 1.5 – 2 times to reduce the period saturation detail and get coatings with high hardness, wear resistance, corrosion resistance. At applying the EMF changing morphology boron layers, needles grains decreases sharply, disappear individually disappear sprouted grain borides in the matrix. Needles boron phases closely adjoin to each other and formed a continuous, homogeneous boron layer thickness is in 2 times higher than the boriding without EMF. Established that the diffusion saturation in boriding mixture during 4 hours without EMF obtain coating thickness is 150 microns, then, as at overlay EMF during 2 hours formed coating thickness is 200 microns; complex saturation with boron and copper during 4 hours without EMF formed coating – 175 microns, then, as at overlay EMF after complex saturation with boron and copper during 2 hours formed boron diffusion phase thickness is 230 microns. At applying EMF in boron layers observed decrease of volume phase FeB and on diffraction patterns taken from the surface of boron coatings recorded the presence of phases FeB and Fe2B, and after complex saturation with boron and copper formed phases FeB, Fe2B and Cu.

Authors : Ie.V. Ivashchenko, G.G. Lobachova, S.I. Sidorenko
Affiliations : National Technical University of Ukraine “Kyiv Polytechnic Institute”

Resume : It was found that a multistage Electric-spark alloying (ESA) of steel mark3 by chrome and graphite to new technological schemes Cr-C, Cr-C-Cr-C, Cr-C-Cr-C-Cr-C in saturating environment (air, argon and propane-butane) allows you to control the structure and properties of coatings by varying the number of stages of processing. It was found influence of the composition saturated environments on structure and properties of steel surface layer due to the formation coatings which containing penetration phases (carbides and nitrides) that formed in result interaction material electrodes with elements environment. Highest thickness layer observed after process ESA in argon (30 microns). It was established that ESA of steel with using anodes in sequence Cr-C-Cr-C-Cr-C in argon results to increase surface microhardness (15 GPa), compared to treatment in air (11 GPa) and propane-butane (14 GPa). This is because the inert environment involves more intense interaction of anodes materials (chrome and graphite), the interaction of which there are fine carbide phase. It was found that the wear resistance of coatings obtained by successive application of the scheme Cr-C-Cr-C-Cr-C increases in 8 times (in environment air) and at 32.5 times (in argon and propane-butane) than wear resistance initial surface without treatment, due to the presence of carbides, which during tests act as a solid lubricant, which is consistent with the principle of Sharpy.

Authors : V. Zhurba, O. Morozov, I. Neklyudov, O. Mats , V. Progolaieva
Affiliations : National Science Center ?Kharkiv Institute of Physics and Technology?, NAS of Ukraine. 1, Akademichna St.,UA-61108, Kharkiv, Ukraine.

Resume : Deuterium thermal desorption spectra were investigated on the samples of austenitic steel 18Cr10NiTi preimplanted at 100, 295, 380, 420, 600 K with different deuterium ion doses. At saturation of austenitic steel with deuterium by means of ion implantation, structural-phase changes take place, depending on the dose of implanted deuterium. Тemperature 100 К. The maximum attainable concentration of deuterium in steel is C=1 (at.D/at.met.=1/1). The increase in the implanted dose of deuterium is accompanied by the increase in the retained deuterium content, and as soon as the deuterium concentration attains C ≈ 0.5 the process of shear martensitic structural transformation in steel takes place. Upon reaching the deuterium concentration C>0.5, the presence of these molecules causes shear martensitic structural transformations in the steel, which include the formation of characteristic bands, bcc crystal structure, and the ferromagnetic phase. At C≥0.5, two hydride phases are formed in the steel, the decay temperatures of which are 240 and 275 K. Тemperature 295 К. Three characteristic regions with different rates of deuterium amount desorption as the implantation dose increases, were revealed. The low-dose region is characterized by formation of deuterium-vacancies complexes and deuterium solid solution phases in the steel. The medium-dose region is characterized by the radiation action on the steel in the presence of hydrogen with the resulting formation of the nanosized crystallite structure having a developed network of intercrystalline boundaries. The total concentration of the accumulated deuterium in the region of medium implantation doses forms the structure, which is capable of retaining 7 to 8 at.% of deuterium.

Authors : S. Kochetova, D. Shakhnin, A. Gab*, T.Stetsyuk**, N. Kushchevskaya***, V. Malyshev
Affiliations : V.I. Vernadsky Institute of General and Inorganic Chemistry, NAS of Ukraine, Kiev, Ukraine *National Technical University of Ukraine, Kyiv Polytechnical Instritute, Kyiv, Ukraine ** Frantsevich Institute for Materials Science Problems of NAS of Ukraine, Kyiv, Ukraine ***University "Ukraine", Kiev, Ukraine

Resume : Urea and acetamide based ion-organic melts are environmentally safe, stable, and technologically convenient solvents for refractory and noble metals salts, having low melting point and sufficiently broad "electrochemical window". Au wire electrochemical behavior was studied in eutectics urea-NH4Cl (16.8 mol. %) and acetamide-NH4Cl (11,3 mol. %) melts at 393 and 373 K, respectively. During Au anodic dissolution in urea melt, Au (III) planar complexes are formed, and in acetamide one - presumably Au (III) octahedral ammonia complexes. In both of studied melts, Au (III) complexes irreversible cathodic reduction to metal takes place in diffusion regime in two stages: Au (III)  Au (I)  Au (0). Potentiostatic electrolysis of urea-chloride melt with Au anode resulted in 5 microns thick metal deposit with particle size 50-100 nm. Potentiostatic electrolysis of acetamide-NH4Cl melt with Au anode resulted in gold coating deposition onto substrate with individual particles size 200-300 nm.

Authors : A. Podyman, N. Sushynskiy, D. Shakhnin, A. Gab*, I. Gab**, V. Malyshev, J. Shuster***
Affiliations : Institute of General and Inorganic Chemistry, NAS of Ukraine, Kyiv, Ukraine *National Technical University of Ukraine “Kyiv Polytechnical Instritute”, Kyiv, Ukraine **Frantsevich Institute for Materials Science Problems of NAS of Ukraine, Kyiv, Ukraine ***University of Vienna, Vienna, Austria

Resume : Tungsten silicides have wide variety of industrial applications from protective coatings for constructional materials to alternative semiconductors films for solar panels. Particularly, refractory metals silicides coatings deposited by currentless method from molten salts can help to improve some mechanical and physico-chemical properties of construction materials, namely refractoriness, oxidation resistance, and corrosion resistance. Strongly adherent, continuous, and poreless tungsten disilicide coatings were obtained at the tungsten sample surface from the molten NaCl-KCl (eut.) – NaF (20 mol. %) mixture containing 5 mol. % of Na2SiF6 and 20 mol. % of elementary Si at the 1123 K on air during 16 hours. The SEM of the cross-section slice has shown the obtained WSi2 coating at the tungsten surface. Strong adhesion between the coating and the substrate was shown together with the absence of Kirkendall voids and any intermediate layers usually consisting of low silicides.

Authors : N. Uskova, D. Shakhnin, A. Gab*, I. Gab**, N. Kushchevskaya***, V. Malyshev V.I. Vernadsky Institute of General and Inorganic Chemistry, NAS of Ukraine, Kiev, Ukraine
Affiliations : *National Technical University of Ukraine “Kyiv Polytechnical Instritute”, Kyiv, Ukraine **Frantsevich Institute for Material Science Problems of NAS of Ukraine, Kyiv, Ukraine *** University "Ukraine", Kiev, Ukraine

Resume : To isolate the tungsten compounds from ores and concentrates, method is commonly used of dissolution in various acids which poor performance and environmental hazards are doubtless. As an alternative method, high-temperature selective extraction (HTSE) can be proposed using non-corrosive chloride-silicate melts NaCl-Na2SiO3.During these melts interaction with tungsten concentrates (wolframite or scheelite), tungsten compounds are transferred into the chloride phase, and iron, manganese, and calcium oxides - into the silicate one.Then, phases are separated by selective decantation. The extraction process is carried out in a silicon carbide crucibles. Charge for HTSE contained in weight %: NaCl - 45,0; Na2SiO3 - 20.0; wolframite - 35.0.Process temperature was 1273-1373 K, duration - 2 h.The liquid halide-tungstate phase was decanted to a separate crucible for further electrolytical isolation of tungsten in the form of nanodispersed powders.

Authors : Yu.Naidich, I.Gab, T.Stetsyuk, S.Martynyuk
Affiliations : Frantsevich Institute for Materials Science Problems of NASU

Resume : The film continuity is determined by the ratio of the metal film adhesion and cohesion to the oxide surface. Accordingly, systems with high adhesion and wettability oxides by metals the have been selected. In this work the kinetics of dispersion-coagulation during annealing in vacuum of niobium, hafnium and zirconium nanofilms deposited onto oxide (sapphire, ceramics based on ZrO2) materials was investigated. It was found that these films deposited onto oxides have almost no changes its structure during annealing up to 1400 oC, and under further rise annealing temperature films disintegration process was intensified significantly. This disintegration of films on both oxides has approximately the same character and almost finished as a result of annealing for 20 min with simultaneous coagulation of small film fragments into larger conglomerates. The intensity of niobium films dispersion onto investigated oxides is slightly higher compared to hafnium and zirconium films. This phenomenon can be explained by different affinity for oxygen of these metals. Kinetic curves decay of the investigated nanofilms on mentioned non-metallic substrates have been fitted. The resulting experimental data can be used in practice for development of new technological modes of joining by brazing or pressure welding of metallized nonmetallic materials.

Authors : D.Zarzycka, P. Wisniewski, M. Malek, J. Szymanska, J. Mizera
Affiliations : Faculty of Materials Science and Engineering, Warsaw University of Technology

Resume : The possibility of obtaining hydrocarbons from Polish shale deposits requires the development of backfilling materials – proppants, utilized in the extraction process. The aim of the research is to develop mixtures from domestic raw materials which are used for ceramic proppants generation by the method of spray drying. Prepared slurries were tested for their rheology. These studies define parameters which affect the stability at the time of homogenization and forming the green proppants, and also affecting the strength of the final product. The raw solids were characterized by: XRF chemical analysis and phase composition by XRD, SEM, with EDS analysis of micro-regions, and particle sizes by laser diffraction. The subject of the study were slurries prepared with kaolin, clay and mixtures of these materials with wt. 10% addition of ash from the combustion of brown coal. Solid content by weight of slurry was 50 wt. % . One of the goals of the research was to assess the liquefaction of the ceramic material. Deflocculants are commercially available: Polikol 1500 Dispex A-40 and MB-10, which introduced an amount of 0.25% by weight relative to the solid phase. Studies of slurries include determination of the density, pH, dynamic viscosity by a coaxial cylinder-type rheometer, and the kinematic viscosity using Zahn Cup # 4. The results showed that both, raw material composition and the nature of the deflocculants have a significant impact on the properties of ceramic slurries. Financial support of BLUE GAS Programme financed from The National Centre for Research and Development Project: “Optimizing the lightweight high strength and low specific gravity ceramic proppants production technology maximally using naturally occurring Polish raw materials and fly ash” , No. BG1/BALTICPROPP/13 is gratefully acknowledged.

Authors : G.A. Bagliuk, O.V. Tolochyna, O.I. Tolochyn, R.V. Yakovenko
Affiliations : Franctsevich Institute for Problems of Materials Science NAS Ukraine

Resume : Due to low raw-material cost, low density, high strength, good wear-resistance, excellent oxidation resistance and sulfurized corrosion resistance, Fe3Al based materials have been attracting a lot of attention for promising industrial applications. As is known, introduction of refractory particles TiC to Fe3Al intermetallic matrix promotes increase of their mechanical characteristics. The mechanical properties and microstructures of Fe?16Al based composites reinforced with 5?15 wt.% TiC ceramic particle, produced by hot forging method, were investigated. The composite was received from a mixture of powders Fe, Al and TiC. During heating of intermetallic compounds Fe3Al synthesis was used. Synthesized samples Fe3Al-TiC was forged at 1150 ?C. The relative density of all the composites was up to 99%. Using the received samples the complex physical and mechanical properties (density, electrical resistivity, bending strenght, fracture toughness, hardness) were researched. The structure of composites and uniformity distribution of TiC in a matrix phase were researched.

Authors : A.Sáez-Maderuelo, D. Gómez-Briceño, C. Maffiotte
Affiliations : Ciemat

Resume : The Generation IV (Gen IV) nuclear reactors are the future option of the nuclear industry. The aim of Gen IV nuclear power plants is enhance the efficiency and safety of the Light Water Reactors (LWR) currently in use. Among the Gen IV designs, the Supercritical Water Reactor (SCWR) is the natural evolution of the LWR. The SCWR uses water as coolant, although at higher temperature and pressure in order to get into de supercritical region (the critical point is at 374 ºC and 22.1 MPa). The Supercritical Water (SCW) has many advantages: water is a familiar and relatively safe heat transfer medium, it allows to work at high temperatures and it has a high specific enthalpy. Nevertheless, the SCW has a drawback: its physicochemical properties change with pressure and temperature inside of the supercritical region behaving more like gas or like liquid depending on the values of these variables. Bearing all this in mind, the main question is what will be the behavior of structural materials to degenerative processes like corrosion in this special environment? The austenitic stainless steel 316 L has been chosen as candidate material for the SCWR due to its optimum mechanical properties and its high resistance to corrosion processes. Moreover, this alloy has shown a good behavior after years of operation in the Light Water Reactors (LWR). The aim of this work is to gain more in-depth knowledge about the oxidation behavior of the 316 L in SCW and to study if there is a continuity of the oxidation mechanism from liquid water to SCW. Results from oxidation experiments of 316 L tested in liquid water at 350 ºC and 25 MPa, steam at 400 ºC and 10 MPa and SCW at 400 ºC and 25 MPa will be presented and discussed

Authors : Igor Andreiev
Affiliations : V. Bakul Institute for Superhard materials NASU

Resume : In this work are presented results of the investigation of geometrical shape distortion of blanks made of a tungsten_based alloy (W-Ni-Fe). Blanks are found to undergo a multistage form alter¬ation due to a liquid–phase segregation in the material during its sintering in a multizone continuous fur¬nace. We have found the liquid phase flow in W–Ni–Fe alloys with contains of tungsten 89 % (weight) during their sintering in a variable temper¬ature field. As the tungsten_based alloy is moved through the furnace, the liquid phase migrates via pores from the head portion of the blank towards the tail one, thus resulting in a distorted blank geometry not only in the cross_section but also along the blank length. The head portion of the blank retains almost cylindrical shape, suggesting that the liquid phase in this portion migrates almost uniformly throughout the entire cross_section of the blank, and density of the blank head portion corresponds to that of an alloy with 8 wt % binder versus the preset value of 11 wt %; density of the tail portion corresponds to that of an alloy with 12 wt % binder, with¬out regard to the bead. The different edge effects (in terms of the form alteration and binder content) for the head and tail portions of the blank confirm that the distortion of the blank shape is mostly due to the temper¬ature gradient induced along the length of the blank as it travels through the furnace working area.

Authors : Liviu Duta1, A. C. Popescu1, C. Popescu1, B. Bita2, A. Husanu3, C. Himcinschi4, G. E. Stan3, V. Craciun1, Penka Terziyska5, A.Szekeres5
Affiliations : 1National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, RO-077125 Magurele, Romania; 2National Institute for Research and Development in Microtechnologies, 126A Erou Iancu Nicolae Street, RO-077190 Voluntari, Romania; 3National Institute of Materials Physics, 105bis Atomistilor Street, RO-077125 Magurele, Romania; 4Institute of Theoretical Physics, TU Bergakademie Freiberg, D-09596 Freiberg, Germany; 5Institute of Solid State Physics, Bulgarian Academy of Sciences, Tzarigradsko Chaussee 72, Sofia 1784, Bulgaria

Resume : Diamond Like Carbon thin films deposited on Si(100) and quartz substrates by Pulsed Laser Deposition (PLD) technique in vacuum or in methane atmosphere were investigated. The morphology, crystallinity, chemical bonding, hardness, adhesion, thickness and optical constants of the as deposited layers were investigated by Scanning Electron Microscopy, X-ray diffraction, Raman spectroscopy, nanoindentation, “pull-out” and spectroscopic ellipsometry. The deposition gas pressure played a crucial role on films thickness, component layers ratio, structure and mechanical properties. Films synthesized in vacuum were a-C DLC type, while those obtained in methane were categorized as a-C:H DLC type. The deposited films were smooth, amorphous, and consisted of a mixture of sp3-sp2 carbon, with 50-90% sp3 content. Most of the films showed a bilayer structure – a higher density layer at the interface with the substrate and a lower density layer on top, as confirmed by the ellipsometric data analysis. Their density and thickness directly influence the overall mechanical properties of the PLD deposited structures.

Authors : Abdullah Alhuthali
Affiliations : Department of Physics, Taif University, P.O. Box 888, Post Code: 21974, Taif, Saudi Arabia Email:; Tel: 966127272020, ext.: 1964;Fax: 966127256500

Resume : With the increasing of worldwide societal awareness about environmental impact, sustainability and renewable energy sources, the polymer natural fibre composites recently have attracted the attention of researchers due to the fact that they are recyclable and biodegradable. This study conducted a new infiltration method that involved very thin sheets of recycled cellulose fibres being fully soaked in viny ester resin for the development of natural fibre reinforced polymer composites. The effect of prolonged water absorption on the mechanical behaviour of cellulose fibre (0 -50 wt%) reinforced vinyl-ester composites was investigated. The elastic modulus of these composites was measured and the data were validated with various mathematical models. Exposure of these composites to water absorption for a long period of time caused a reduction in mechanical properties such as elastic modulus, strength and toughness.

Authors : Tsukrenko V.V., Ruban А.К., Red’ko V.P., Dudnik Е.V.
Affiliations : Frantsevich Institute for Problems in Materials Science Krzhizhanovsky str.3, 03680, Ukraine, Kyiv-142.

Resume : Zirconia-based ceramics are characterized by high strength, fracture toughness, corrosion resistance, bioinertness and are perspective for orthopedic and dental restorative applications. The additive of CeO2 and Al2O3 increases resistance of Y-TZP ceramics to low temperature aging in the living organism environment. The microadditive of СоО provides colour contrast of ceramics. The physicochemical properties of nanocrystalline powders for designing of ceramics in the ZrO2–Y2O3–CeO2–СоО–Al2O3 system after heat treatment in the temperature range from 400 to 1300 °C with different amounts of CoO were investigated. XRD phase analysis, scanning electron microscope and BET measurements were used. It was found that the addition of Al2O3 increased the temperature of phase transformation of metastable F-ZrO2 to T-ZrO2 (F-ZrO2→T-ZrO2) whereas the microadditive of CoO decreased the begining of F-ZrO2→T-ZrO2 phase transformation up to 150 °C in comparison with composites in the ZrO2–Y2O3–CeO2 system. The traces of monoclinic phase of ZrO2 (M-ZrO2) were detected after “aging” of composites in the ZrO2–Y2O3–CeO2–СоО–Al2O3 system under hydrothermal conditions. Since the amount of M-ZrO2 after aging was less than 5 % the designed ceramics resistant to the aging in the humid environments and are perspective for the microstructural design of bioinert implants of various purpose.

Authors : Lesya Demchenko1, Sergey Sidorenko1, Anatoliy Titenko2
Affiliations : 1 Metal Physics Department, National Technical University of Ukraine “Kyiv Polytechnic Institute”, Kyiv, Ukraine,; 2 Institute of Magnetism, Kiev, Ukraine

Resume : The diffusion saturation of iron-based alloys with nitrogen and carbon is widely used in industry for increasing of strength, hardness, wear and corrosion resistance of metal products operating in extreme environment. Inexhaustible and unrealized potentialities of such treatment are opened when applying it under strain and stress condition. The topical question in this direction is to clarify the diffusion and strengthening mechanisms during chemical-thermal treatment of strained alloys . The structure, phase composition and properties of surface diffusion layers formed in the preliminary deformed alfa-Fe, Fe-Cr, Fe-Ti, Fe-Cr-Ti, Fe-Ni alloys after diffusion saturation with N and C were studied. The diffusion layer is a combination of surface layers of different nitride phases, nanostructured eutectoid layer and a zone of internal saturation (alfa– phase). Deformation considerably effects on the phase formation, structure, microhardness and thickness of nitrided layers. The microhardness test of nitrided layers has discovered the narrow intervals of deformations of 3-8 % and 20-30 % in which the considerable rise (in about 2 times) of microhardness of the surface diffusion layer after nitriding exist. The high microhardness of the diffusion layers results from the nitride phases formation.

Authors : A.D. Pogrebnjak1,5, O.V. Bondar1, A.P. Shypylenko1,3, K. Medjanik2, B. Peplinska3, M. Beresnev4, S. Jurga3
Affiliations : 1. Sumy State University, Sumy, Ukraine, 2. Lunds Universitet, MAX IV Laboratory, Lund, Sweden 3. NanoBioMedical Centre at Adam Mickiewicz University, Poznan, Poland 4. Kharkov National University, Kharkov, Ukraine. 5. Lublin University of Technology, Lublin, Poland

Resume : Nanocomposite Ti-Si-N and Ti-Hf-Si-N coatings were investigated using RBS, EDX, NEXAFS, PIXE, XRD, SEM and nanohardness measurements in different states: as deposited, after ion implantation by Cu ions with 2x1017 concentration (Ti-Si-N) and by Au ions with 1x1017 concentration (Ti-Hf-Si-N), as well as after thermal annealing under the 600°С temperature for 30 minutes in air. Phase analysis detected the forming of the multiphase systems. The main crystal phases in the as deposited state were TiSi0.51N0.42 solid solutions and (Hf,Ti)N on the basis of cubic lattice of the Fm-3m structure type. Si3N4, Ti2N, TiN0.5 crystal phases were also found. Homogeneous distribution of elements on the coating’s surfaces were detected due to SEM with EDS data. Teardrop fractions appeared on the surface of Ti-Hf-Si-N coatings after ion implantation by Au. That nanohardness H was 21.96 GPa and elasticity modulus E was (300 ±14) GPa for Ti-Si-N coatings in as deposited state, H=19.50 GPa, E=(267 ±20) GPa for Ti-Si-N coatings after ion implantation by Cu, H=15.95 GPa, E=(280 ±25) GPa for annealed Ti-Si-N coatings. Integral nanohardness Н = 42.1 GPa and elasticity modulus Е = (390 ± 17) GPa were obtained for Ti-Hf-Si-N coatings. In addition, we provide the analysis of vacancy-type defects using slow positron beam. Redistribution of defects and impurities after thermal annealing were found, influence of defects and microstructure on mechanical characteristics were explored.

Authors : Paulina Chęsy
Affiliations : Central Institute for Labor Protection - National Research Institute; Department of Personal Protective Equipment, Czerniakowska 16, 00-701 Warszawa, Poland

Resume : Nowadays, in case of an occupational exposure to liquid chemical substances, workers in the different branches of industries have to own an appropriate personal protective equipment, provided insufficient protection given by other means. In workplace, it is also worth noticing that most frequently protective gloves, footwear and clothing are simultaneously used by employees during the impact of chemical factors. Materials, which are used in personal protective equipments such as gloves, footwear or clothing, are polymer films due to their special properties. However, when there is a risk associated with the extreme conditions in the workplace for example exposure on to acid concentrated, the most important issue is the analysis of interaction between substance and polymer material. The method of interaction between these compounds and polymer layers has influence on the ability to move through the material at the molecular level - permeation. In fact, it should be noted that the effectiveness of protective barrier is depended on the method of this interaction and moreover is assessed on the basis of breakthrough time. For that reason, the crucial aspect of assurance safety to workers is to evaluate both time and concentration substance which has permeated through the protective material. The main aim of this study was to elaborate the methodology for the analysis of the resistance to permeation in accordance to the new strategy which is unified for protective gloves, footwear and clothing and was proposed by Notified Bodies in EU which perform PPE analysis.

Authors : V.Avetisian, A.Demchishin
Affiliations : Frantsevich Institute for Problems of Materials Sciences of NAS of Ukraine

Resume : Titanium nitride and TiN-based alloys with high wear and errosion resistance are perspective as coatings for various extreme applications. The most promising method of manufacturing of this types of coatings is ion plasma technology using cathode arc vacuum evaporation. This technology allows to create high ionized plazma flows for various gas atmospheres and vacuum and it essentialy influence upon the processes of synthesis and growth of metal and ceramic compounds on various kinds of substrates. Double and triple compounds of titanium nitride with Al, Cr, Zr additives had been produced using arc-vacuum evaporation on modified unit Bulat -3T. The structure and mechanical properties of these coatings had been investigated. It was shown that the main reason of essential hardness increasing for multilayered compositions is the formation of great number of boundaries between nanolayers and blocking of the moving of linear defects by these boundaries. Thus multilayered condensates have a great advantages in comparison with dopped and undopped single layered coatings

Authors : I.Valeeva
Affiliations : Frantsevich Institute for Problems of Materials Sciences of NAS of Ukraine

Resume : Measuring mechanical properties of materials is important for design and simulation of materials behaviors and evaluation of their functionality, especially for extreme environments. This work deals with measuring mechanical properties of constructional materials using spherical indentation data. Dimensionless expressions for the contact characteristics: contact load, contact area, mean contact pressure, approach of solids, and mean (over the area of the contact) deformation directed along the applied load are based on the finite element simulations. Approximations for dimensionless contact characteristics are obtained in a wide range of material properties: reduced elastic modulus of contact pair, yield strength of specimen material, work-hardening exponent of material. These approximations are also found for hard materials with low ratio of elastic modulus to yield strength. This approach is applied to constructional materials that behave differently in tension and compression

Authors : Kalinichenko A.I., Perepelkin S.S., Strel’nitskij V.E.
Affiliations : National Science Center "Kharkov Institute of Physics and Technology"

Resume : The opportunity of forming of nanometer-sized through hole in the metal film by heavy ion with energy from the range of elastic loss domination is theoretically investigated. It is assumed that the following conditions have to be met for origination of through hole: 1) molten channel is formed throughout the film thickness h; 2) the total time of pressure stabilization τs ~ 2R/s and melt ejection from the channel Te~ h(p/2vK)1/2 should not exceed the cooling time tT ~ R2/4κ of the channel with radius R. Here s is the sound velocity, ρ is the mass density, K is the bulk modulus, κ is the phonon diffusivity and v is the specific dilatation of film material during melting. The minimal cross size 2Rmin of the channel providing melt ejection is equal to 16κ/s in order of magnitude. Simulations of cascades of excited atoms generated by Xe+ ions with energy of 200 keV in the gold film of thickness h = 50 nm were performed using package SRIM2008. They have shown the possibility of formation with probability w ~ 0.01 near the ion path through the entire thickness of the film of continuous overheated region satisfying the above criteria. The conclusions are in accordance with the experimental data

Authors : L.R.Vishnyakov, V.A.Kohany, A.V.Neshpor, I.N.Kohanaya, Yu.M.Vasilenkov
Affiliations : Scientific center "Composite materials"

Resume : Fire safety of wind power units placed in offshore zones depends essentially upon perfection of the lightning protection system of turbine blades. Since the storm activity in the offshore zones is characterized by multi-vector behavior of lightning strikes, and the length of the blades is large and can exceed 80 meters and more, it becomes apparent that special lightning capture coatings are necessary for reliable work. Knitted and soldered special copper netting molded on the surface of carbon plastic composite during the process of wind blade production had been proposed. Unlike other types of lightning receivers proposed meshed lightning receiver has dissipative properties and ensure not only effective removal of electric charges and heat from lightning place but also decreasing of carbon plastic thermal degradation due to evaporation of low-melting solder and straightening of loops Electric charges trapped on lightning receiver discharged using special earthing tire produced from similar mesh. The results of practical tests of such kind of wind blades had been presented

Authors : Braude I.S., Gal'tsov N.N., Geidarov V.G., Kirichenko G.I., Abraimov V.V., Lototskaya V.A.
Affiliations : B.I.Verkin Institute for Low Temperature Physics and Engineering of NАS of Ukraine

Resume : Recently the polymers has become an avalanche process, due to their unique properties . Particularly, polyimide materials (type PM-A, kapton H) are are widely used in space technics as a basis thermocontrol coverings of SV, as solar reflectors and aerials, electroinsulation materials, materials of fastening of SV devices and other elements SV. However, because of the complex molecular structure of some questions there is still no clear answer. This is due to the fact that these objects are composed of high molecular weight randomly entangled and intertwined molecules. At various external influences they begin to transform, in some cases forming independent structural formations. For X-ray study of such substances gives typical amorphous bodies X-ray scattering pattern, characterized by short-range order. This paper presents the results of a study by X-ray diffraction, polyimide type PM-A Group V [1] subjected to uniaxial tension (elastic deformation), bulk compression (by cooling to low temperatures) and their joint impact. X-ray diffraction studies were carried out on a DRON-2.0 with Cu-Kα anode and Ni filter system with collimation slits. Measurements were carried out in the angular range 2θ = 4 - 70о. The samples, which conducted the study, is a molecular crystal in which there is no long-range order of the position of the molecules. In all the observed diffraction patterns there is a diffuse halo. The reason for this result is, in first approximation, a linear PM-A A can be explained by different mechanisms of ordering of long molecules under uniaxial and bulk loading.

Authors : Lungevics Janis1, Zavickis Juris2, Pluduma Liene2, Gross Karlis Agris2
Affiliations : 1 Riga Technical University Institute of Mechanical Engineering, 2 Riga Technocal University, Institute of Biomaterials and Biomechanics

Resume : A precise surface evaluation method is required to determine the changes on low friction surfaces after exposure to an extreme environment. This study assessed the appearance of highly polished steel (polished with 1 µm polycrystalline diamond suspension) with optical microscopy and scanning electron microscopy, but the topography with atomic force microscopy, digital microscopy and profilometry. SPIP image metrology software was used to process the AFM and profilometry raw data. Precisely positioned surface indents established a viewing window of coarse and fine surface features within the same area with different experimental techniques. The results showed that optical microscopy provided the fastest viewing and better-distinguished surface features than scanning electron microscopy. Furthermore, it has the necessary portability for observations in the field. For topographic measurement, there was a limitation on each method, but atomic force microscopy provided the best quantitative measure at the finer scale. It also provided the fastest image profile capture than other techniques. The sensitivity was the best for atomic force microscopy but decreased when measurements commenced within a large surface irregularity. Optical microscopy and atomic force microscopy showed the best combination for retrieving qualitative and quantitative data on components with a high surface finish, respectively.

Authors : Aleksandra Kedzierska(1)(2), Paulina Wiecinska(1), Pawel Falkowski(1), Mikolaj Szafran(1)
Affiliations : (1)Faculty of Chemistry, Warsaw University of Technology, Warsaw, Poland; (2)Laboratory of Advanced Ceramics, Institute of High Pressure Physics PAS, Warsaw, Poland

Resume : In the field of materials engineering, scientists from all over the world are continuously developing new materials for challenging applications in aerospace, medicine, transportation or manufacturing, to mention the most important. Ceramic materials (single- or multiphase) are promising materials to fulfil these applications. On the one hand ceramic materials have many beneficial properties such as high hardness, chemical and temperature resistance or excellent wear resistance. Conversely, properties like fracture toughness, thermal shock resistance or Weibull’s characteristics still need to be improved. One of the methods to further improve properties of ceramic materials is incorporation of nano- and micro- metal particles into their structure. These new materials, named ceramic-metal composites, have shown better behavior in the above mentioned areas, depending on type, size and volume fraction of the particular metal particles. In present work the alumina – tungsten composite was formed by slip casting method. The addition of metal phase causes changes in viscoelastic properties of water-based ceramic slurries what has been examined by Authors. Among particles appears the heteroflocculation effect which results in good adhesion between ceramic and metal phases. The ceramic-metal interaction is crucial for improvement of some properties, like fracture toughness. This work was financially supported by National Science Center of Poland (grant number 2014/13/N/ST5/03438).

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Authors : V.I. Ivashchenko(a), S. Veprek(b), P.E.A. Turchi(c), P.L. Skrynskyy(a), S.N. Dub(d), O.O. Butenko(a), O.K. Sinelnichenko(a), O.G. Lysenko(d)
Affiliations : (a)Institute for Problems of Material Science, NASU, Кrzhyzhanovsky Str. 3, 03680 Kyiv - 142, Ukraine (b)Department of Chemistry, Technical University Munich, Lichtenbergstrasse 4, D-85747 Garching, Germany (c)Lawrence Livermore National Laboratory (L-352), P.O. Box 808, Livermore, CA 94551, USA (d)Institute for Superhard Materials, NASU, Autozavodska str. 2, 04074 Kyiv-74, Ukraine

Resume : AlMgB14 -based coatings were deposited by magnetron sputtering from the AlMgB14 and B4C targets on silicon wafers at different discharge powers. The coatings were characterized by X-ray diffraction, X-ray photoelectron and Fourier-transform infra-red spectroscopy, and by nano- and micro-indentation. The deposited coatings were annealed in vacuum at 600-1200 0C. To understand the structure and properties of the coatings in more detail, first-principles molecular dynamics simulations of different crystalline and amorphous AlMgB14 –based materials were carried out. The experiments revealed that both the as-deposited and annealed coatings were X-ray amorphous. The experimental and theoretical results show that the dominant bonds in the amorphous compounds are inter-icosahedron B-B ones. In these materials, the boron icosahedra are not fully developed. The nanohardness and Knoop hardness increased from 12 GPa to 24 GPa and from 16 GPa to 32 GPa, respectively, when the discharge powers at both the targets increased from 6.4 W/cm2 to 21.9 W/cm2. The strengthening of the coatings is supposed to be due to the formation of icosahedron-like polyhedrons and strong bonds connecting them in the X-ray amorphous boron matrix. The stability of the mechanical properties of the coatings at high temperatures (up to 1200 0C) enables one to use them as protective and wear-resistant coatings operating at elevated temperatures.

Authors : G. Socol1, D. Craciun1, G. Dorcioman1, N. Stefan1, V. Grumezescu1, V. Craciun1, D. Cristea2, L. Floroioan3, M. Badea4, D. Pantelica5, P. Ionescu5
Affiliations : 1National Institute for Lasers, Plasma and Radiation Physics, Măgurele, Romania; 2Materials Science Department, Transilvania University, Brasov, Romania; 3 Fac Elect Engn & Comp Sci,Transilvania Univ Brasov, Brasov, Romania; 4Faculty of Medicine, Transilvania University, Brasov, Romania; 5Horia Hulubei National Institute for Physics and Nuclear Engineering, Măgurele, Romania

Resume : Most of the problems associated with metallic implants occur at the metal-body interface. To improve the mechanical and chemical stability of this interface and promote bone growth, the implant’s surface is usually coated with a biocompatible thin film. We deposited ZrN, ZrC, TiN, and TiC films on Ti implants by the pulsed laser deposition technique to investigate their properties. The films were deposited at room temperature on mirror-like polished or textured Ti substrates using a KrF laser under CH4 or N2 atmosphere. The mechanical properties of the films were characterized by nanoindentation, scratch and wear tests. The structural properties were obtained from grazing incidence X-ray diffraction and X-ray reflectivity investigations. The chemical composition was measured by Rutherford backscattering spectrometry. Electrochemical measurements involving corrosion and electrochemical impedance spectroscopy studies were carried out in physiological solutions to investigate the chemical stability of the titanium, bare or covered with the PLD grown films and to compare their performance. The dependence of their corrosion resistance parameters on time was inferred and the involved electrochemical parameters were estimated by fitting the experimental data via equivalent electric circuits. The results clearly showed that the deposition of coatings resulted in more stable surfaces that were less affected by corrosion and exhibited better mechanical properties than bare Ti.

Authors : A.V. Vasin, A.V. Rusavsky, A.N. Nazarov, V.S. Lysenko, V.P. Kladko, O.Yo. Gudymenko, C. Nouveau, S.P. Starik
Affiliations : Lashkaryov Institute of Semiconductor Physics, NASU,Kiev, 03028 Ukraine CER Arts et Métiers ParisTech, Rue Porte de Paris, F-71250, Cluny, France , Bakul Institute of Superhard Materials NASU, 2 Avtzavodskaya str., Kiev, 04074 Ukraine

Resume : Amorphous silicon carbide films were deposited on silicon substrates at 200 °C by RF-magnetron sputtering of SiC target in argon or argon/methane gas mixture. Hydrogenated and non-hydrogenated layers were examined in terms of density, mechanical stresses, wear/corrosion resistance and friction coefficient. Density of the films was varied in range of 1.6-3.4 g/cm3 by varying magnetron discharge power and working gas composition. FTIR and Raman spectroscopy identify the structure of as-deposited films as amorphous SiC matrix with incorporated carbon nano-clusters. After the deposition the samples were thermally treated in argon or oxygen. As-deposited films exhibited compressive stresses that were partially relaxed after annealing in pure argon. Annealing in oxygen resulted in evolution of compressive stresses into tensile. It was demonstrated that oxidation resistance as well as mechanical stresses directly correlate with density of the films. Structural model of stress evolution in oxidized material and possible way of stress engineering in a-SiC:H films by thermal treatment in oxygen are proposed.

Authors : A. Rizzo, D. Valerini, L. Mirenghi,  F. Di Benedetto
Affiliations : ENEA - Italian National Agency for New Technologies, Energy and the Sustainable Economic Development, Technical Unit for Materials Technologies - Brindisi Research Center, S.S. 7 Appia km. 706, 72100 Brindisi, Italy.

Resume : Extreme conditions/environments of temperature, wear and corrosion easily occur in a very wide number of applications, from energy (concentrating solar power systems, thermoelectric devices, oil and gas plants, etc.), to transportation (aeronautics and aerospace, marine transportation, etc.) and manufacturing (high-speed machining, cryogenic machining). Consequently, the use of protective coatings in these technological fields has a strong importance for the industrial economy. The aim of the present work is to produce the ZrN coatings deposited by Reactive Bipolar Pulsed Dual Magnetron Sputtering (BPDMS) and to study the relationships between the target-power and the plasma parameters and their impact on the film growth. In particular, the effect of BPDMS technique on chemical, structural and mechanical properties of the deposited ZrN films was pointed out. XPS characterization inside the ZrN films has revealed the presence of stoichiometric ZrN and a uniform concentration profile along their thicknesses. At highest power (2 kW) the metallic component was detected on Zr3d high resolution spectra beside the nitride comnponent, while at lowest power (0,5 KW) there is no metallic component but the nitride is a mixture of ZrN and Zr3N4, in the following percentage 70:30. The oxygen level is well below the 2 at. %. For BPDMS with 80 kHz and increasing duration of the duty cycle from 20 to 50 % the hardness increases from 20 to 32 GPa, respectively.

10:30 Coffee break    
Authors : M. Parco Camacaro(1), I. Fagoaga(1), O. Grigoriev (3), L. Silvestroni (2), I. Neshpor(3)
Affiliations : 1-Tecnalia, Spain; 2-Institute of Science and Technology for Ceramic of Council of National Research of Italy; 3- Frantsevich Institute for Problems of Materials Sciences of NAS of Ukraine

Resume : Ceramic powders based on ZrB2, ZrB2-WC and ZrB2-MoSi2 produced by IPMS (Ukraine) and CNR (Italy) have been deposited by plasma detonation on C/C substrates by TECNALIA (Spain). Coatings have been directly sprayed on C/C substrates without intermediate layers. Various powder granules size and set-ups of deposition have been tested and the structure and phase composition of the coatings have been determined. The mechanical properties of the best coatings have been measured by indentation method. Comparative ablative testing with HHO flame of the coatings have been carried out. Preliminary HHO jet ablative tests revealed that with suitable powder treatment, ZrB2-based coatings can be effectively applied to C/C substrate, thus improving their oxidation resistance.

Authors : D.K. Yeskermessov(1), A.D. Pogrebnyak(2), S.V. Plotnikov(1), N.K. Erdybaeva(1)
Affiliations : (1) D. Serikbayev East Kazakhstan State Technical University, 19 Serikbayev Street, 070004, Ust-Kamenogorsk, Kazakhstan (2) Sumy State University, Rimsky-Korsakov Street, 2, 40000, Sumy,Ukraine

Resume : Structure and properties of multicomponent nanostructured (Ti–Cr–Zr–Nb)N coatings obtained by vacuum-arc-deposition were investigated. Coatings thickness reached 6.2 m, hardness and cohesive strength were H = 43.7 GPa and Lc = 62.06 N respectively. Structure formation of the three interstitial phases with cubic, hexagonal and tetragonal lattices in coatings was observed. Nanocrystallites sizes ranged from 4 to 7.3 nm. Also the results of SEM, TEM, EDS and XRD are shown in the paper. One of the most investigated and widely used coatings are nitrides, carbides and carbonitrides of titanium thickness of 5-10 microns. However, the possibilities are elevated hardness and plasticity of the surface layer by applying simple nitrides are almost exhausted, since at temperatures in 400-500º C carbides and nitrides are thermally unstable.A complex of physical and mechanical properties of pure metals like zirconium, niobium, titanium, molybdenum, and chromium allows us to assume that the investigation of vacuum- plasma condensates based on the Ti-Cr-Zr-Nb system is advisable. This in turn allows one to generate a pro¬tecting layer (or coating) of five elements (four transition metals and nitrogen as a bonding agent).Protective coatings about 6.2 μm thick were deposited onto polished substrates surfaces (the materials were steel of the 45 grade, silicon) in a molecular nitrogen atmosphere using a Bulat-6 vacuum-arc plant. The evaporable material was a one-piece cathode Ti+Zr+Cr+Nb (having the composition Cr-37.39, Zr-27.99, Nb-22.30, Ti-12.32 at %) produced by electron-beam melting.The use of the pulse stimulation in the for¬mation of coatings makes possible the intensification of the ion—plasma flow energy, which improves the film adhesion to the substrate and provides a possibility of producing more disperse coating structure. The results of our studies present a new stage in solving the problem of the development of protective coat¬ings of multicomponent systems, whose structural and phase characteristics make it possi¬ble to improve functional characteristics of various products that operate at high temperatures, loads, and wear rate.

Authors : Y.O. Tleukenov(1), A.D. Pogrebnyak(2), S.V.Plotnikov(1), N.K. Erdybaeva(1)
Affiliations : (1) D. Serikbayev East Kazakhstan State Technical University, 19 Serikbayev Street, 070004, Ust-Kamenogorsk, Kazakhstan (2) Sumy State University, Rimsky-Korsakov Street, 2, 40000, Sumy,Ukraine Email:

Resume : Nanocomposite films Nb-Al-N produced by magnetron sputtering were researched in this work. Two stable crystalline structural states were found in the films: NbNch and solid solution В1−NbxAl1-xNyO1-y, and also an amorphous component associated with aluminum oxynitride with reactive magnetron sputtering. Sensitivity of substructural characteristics was set up to the current supplied to Al target and their relationship with the characteristic nanohardness and Knoop hardness. Recent changes in the range of 29-33.5 GPa and 46-48 GPa, respectively. Initial principle calculations of phases NbN and Nb2AlN and also heterostructures of NbN/AlN were carried out for the interpretation of the results. The work was performed as a part of two complex state programs: "Development of nanostructured superhard coatings formation foundations with high physical-mechanical properties" (number 0112u001382) and "Physical principles of plasma technologies for complex processing of multicomponent materials and coatings" (number 0113u000137c). Films Nb-Al-N were deposited on silicon substrates by magnetron sputtering targets of Nb and Al at different discharge powers at the target of aluminum. Experimental and theoretical studies show that the films obtained at selected deposition parameters have the nanocomposite structure that represents the nanocrystalsВ1−NbNx and В1-NbxAl1-xNyO1-y, embedded in a-AlNO matrix (nc−В1−NbNx/nc−В1−NbxAl1-xNeO1-y/a−AlNO). Nanocomposite coating with high microstrain action due to the difference in atomic radius of the crystal lattices metal components shows high hardness values (up to 32 GPa). Deposited nanocomposite films may be recommended with the given mechanical properties as wear resistant or protective coatings.Nb-Al-N films were deposited on silicon substrates by magnetron sputtering of Nb and Al targets at different discharge powers at the target of aluminum. Experimental and theoretical studies show that the films obtained at selected deposition parameters have the nanocomposite structure that represents the nanocrystalsВ1-NbNx and В1-NbxAl1-xNyO1-y, embedded in a-AlNO matrix (nc-В1-NbNx/nc-В1-NbxAl1-xNeO1-y/a-AlNO). Nanocomposite coating with high microstrain action shows high hardness values (up to 32 GPa) due to the difference in atomic radius of the crystal lattices metal components. Deposited nanocomposite films with the given mechanical properties may be used as wear resistant or protective coatings.

Authors : Ching An Huang, Jhih You Chen, Fu Yung Hsu*
Affiliations : Department of Mechanical Engineering, Chang Gung University, Taoyuan 333, Taiwan * Department of Materials Engineering, Ming Chi University of Technology, New Taipei 243, Taiwan

Resume : Cr-Fe-C alloy deposits could be successfully prepared on high carbon tool steel in the Cr3+- based electroplating bath containing Fe2+ ions and with complex agents. A Cr-Fe-C alloy deposit can be obtained with an electroplating current density higher than 25 Adm-2, and a Fe-Cr-C alloy deposit with 20 Adm-2. After electroplating, these alloy deposited specimens were annealed via rapid thermal annealing at 500oC for 1 to 60 s. Experimental results shown that Cr- and Fe-based alloy deposits could be obviously hardened after annealing at 500 oC for a few seconds. The highest hardness of 1230 Hv can be detected from Cr-Fe-C alloy deposit annealed at 500oC for 10 s. Harden phases of annealed Cr- and Fe-based alloy deposits were confirmed to be precipitation of C-related membranes. The hardness of annealed Cr- and Fe-based alloy deposits increases with an increasing the degree of crystallization of C-related membrane. Above-mentioned experimental results were fully discussed in this study.

12:30 Lunch break    
Authors : F. Khelifa, S. Ershov, M.-E. Druart, Y. Habibi, M. Olivier, R. Snyders, Ph. Dubois
Affiliations : University of Mons, Institute of Research in Science and Engineering of Materials, Belgium

Resume : Al and its alloys are widely used in automotive and aeronautic industries. Due to excellent corrosion resistance, conversion layers containing hexavalent chromate Cr(VI) were since long used for applications in aggressive environments. However, because of their toxicity, European Directives forbade the use of Cr (VI). In the current work a protective multilayer system was developed as an alternative to chromate-based coatings and its corrosion properties were evaluated. As the first layer a plasma polymer film (PPF) was selected due to good adhesion and a highly dense cross-linked structure. The careful control of synthesis from an organo-silicon precursor led to deposition of a hybrid organic-inorganic PPF rich in free radicals. The prerequisite for efficient grafting of the second layer, i.e. the surface free radical density evaluation, was addressed by the means of NO chemical derivatization with subsequent X-ray Photoelectron Spectroscopy analysis. Then the surface reactivity was beneficially exploited for initiation of free radical polymerization of an acrylic monomer guaranteeing a better compatibility with the final layer deposited by spin coating. The characterization of each layer and successive individual contributions to the corrosion protection enhancement of the entire multilayer system are reported. The improvement of anti-corrosion properties of the multilayer coating by about three orders of magnitude as compared to the uncoated Al substrate is observed.

Authors : P. Sharma and J. Dutta Majumdar
Affiliations : Indian Institute of Technology Kharagpur

Resume : In the present study, a detailed investigation of the kinetics and mechanism of hot corrosion of the thermal spray deposited nickel based boride dispersed coating on AISI 304 stainless steel has been undertaken in a 70% NaSO4+30% NaCl molten salt media in the temperature range between 700oC to 900oC. Thermal spray deposition has been carried out on sand blasted AISI 304 stainless steel substrate by flame spraying and HVOF spraying techniques using nickel based hard faced alloy (Ni-68.4Cr-17B-3.9Si-4.9 Fe-5.8) as precursor powder. A detailed microstructural investigation of flame sprayed layer showed the formation of Ni3B precipitates in equiaxed -Ni grains. HVOF deposition led to development of Ni3B and Cr2B dispersion in meta-stable amorphous -Ni matrix. Hot corrosion behaviour was studied in a 30% NaCl+70% Na2SO4 molten salt media under cyclic heating with a cycle duration of 3 hrs for a maximum no. of 18 cycles. Followed by hot corrosion, a detailed investigation of microstructure and phases of the corroded surfaces (top surface and cross-section) were carried out by scanning electron microscopy and X-ray diffraction techniques to understand the mechanism of hot corrosion. Finally, the mechanism of hot corrosion has been proposed following a detailed thermodynamic analysis of phase formation schedule and correlating it with the characteristics of the hot corroded surface.

Authors : Daniël H. Turkenburg, Corné H. A. Rentrop, Stefan P. C. Belfroid, Kees A. M. Veeken
Affiliations : TNO Science and industry, NAM

Resume : Control of the water behavior in gas/water flows is of great importance for the production of natural gas from hydrocarbon reservoirs. Cocurrent flow of gas liquid mixtures in vertical transportation tubes may follow various regimes (bubbly, churn, annular). Pressures are high and process conditions extreme. Being able to precisely predict such flow transitions is of high importance to industrial applications due to associated pressure drop relations, instability mechanisms or occurance of catastrophic fluid pulsations. The effect of interactions between the surface and liquid (wettability, polarity) is typically not taken into account in conventional models. In our approach we study systematically the relation between small scale (the size of droplet) wetting phenomena (surface energy, advancing and receding contact angles and polarity) and observed large scale flow phenomena (flow regime development over several meters to kilometers). We have developed a hydrophobic coating and surface modification techniques that are applied on the interior of transparent tubes. A flow setup has been assembled and pressure gradient and high speed camera recordings are used to quantify flow phenomena with respect to gas/liquid flow settings. It was found that wettability of the wall can have a very large effect on the observed flow regime. Due to the coating only stability of the annular flow regime can be enhanced and catastrophic churn flow can be prevented. This work was funded by NAM

Authors : Durov O.V., Karpets M.V., Sydorenko T.V., Kostyuk B.D., Naidich Y.V.
Affiliations : I.N.Frantsevich Institute for Problems of Materials Science National Academy of Science of Ukraine

Resume : Zirconia as the transition metal compound can lose the oxygen with formation of non-stoichiometric phases. Stoichiometry influence the properties of material, so the wetting of non-stoichiometric zirconia by inert metals (Cu, Ni, Sn, Ge, Ag, Pt) and alloys (Cu-Ga, Cu-Ge, Cu-Ni) was studied in condition when high degree of oxygen deficit in zirconia was provided by the contact to active metal melt (such as Cu-Ti, Ni-Ti, Ti). It was established that inert metals melts wets the non-stoichiometric zirconia. This effect was explained by next: the oxygen deficit may be considered as the zirconium surplus; this surplus zirconium dissolves in metal melt, and when changes the melt composition surface properties of the melt changes also. As the zirconium is active metal, adhesion of melt to oxide substrate increases. For nickel case the microstructural study has found the nickel-zirconium intermetallide on the meta-oxide interface, it confirms the interaction of nickel melt and zirconium from substrate. Thermodynamic calculations have shown that such a process is quite possible. Thin films were also considered. It was found that films of Pt, Pd and Ni on stoichiometric zirconia congregates in islands at temperatures significantly lower than temperatures of corresponding metal melting, and on non-stoichiometric zirconia films retains continuous. It also can be explained by metal film to substrate chemical interaction.

15:15 Coffee break    
Authors : Eunhae Koo1, Sangil Hyun, A. Dong Whan Seo2, Hyun Chul Kim3,
Affiliations : Korea Institute of Ceramic Engineering and Technology Seoul, Korea

Resume : The most critical issue on flexible electronics such as flexible display, organic solar-cell etc. is the protection of the core active materials from the degradation by water and oxygen. The current status of WVTR (Water Vapor Transmission Rate) in barrier film technology is yet to meet the requirement of 1 x 10-6 g/m2/day. Furthermore, the current WVTR measurement systems do not have the reliable capability to measure such the required WVTR condition. In this study, Al2O3/SiO2 hybrid-layered barrier film was developed for the high performance barrier film. The defect of barrier film is the main channel for the transmission of water molecules. To elucidate the generation and density of defect in barrier film, the SiO2 interlayer was investigated theoretically and experimentally. The residual stress inside of barrier film after thermal treatment was studied by finite element analysis with the thickness of SiO2 varied and the WVTRs of differently configured barrier films were measured to be compared. Also the size, density of defects and the WVTR of barrier films were studied on the thickness of Al2O3 layer. In order to visually monitor the defects in barrier film as well as to achieve the advanced WVTR measurement system, a highly sensitive and reversible fluorescent water sensor system was developed and scrutinized.

Authors : Ching An Huang, Chin Huo Chuang
Affiliations : Chang Gung University

Resume : Cr-C-Al2O3 deposits with different Al2O3 concentrations were successfully prepared on a Cu substrate using Cr3+-based electroplating baths. The microstructures of the Cr-C-Al2O3 deposits were examined using optical, scanning and transmission electron microscopes. The hardness values, the corrosion and wear resistance of the Cr-C and Cr-C-Al2O3 deposited specimens were evaluated. Based on the experimental results, the hardness values of the Cr-C-Al2O3 deposits increased with increasing Al2O3 concentration in the electroplating bath. According to our microstructure study, Al2O3 nanoparticles were uniformly distributed within the Cr-C deposits after electroplating in a Cr3+-based plating bath. The wear and corrosion resistance of the Cr-C-deposited specimens could be noticeably improved by adding Al2O3 nanoparticles to the deposit. This result is attributed to a reduced number of cracks in the Cr-C deposit after the addition of Al2O3 nanoparticles. The Cr-C-Al2O3 deposited specimens, which were prepared in a plating bath with an Al2O3 concentration of 50 gL-1, had a relatively high corrosion and wear resistance compared to the other specimens. The above-mentioned results will be discussed in this study.

Authors : C. Rentrop , H. Slot, H. van Bracht, E. van der Heide, M. Le Feber
Affiliations : TNO

Resume : Future growth in wind energy depends heavily on the economic feasibility of new offshore capacity. Locations at sea give rise to more demanding environments, e.g. due to water droplet laden winds. Erosion of the leading edge of the turbine blades by droplet impingement wear, can easily reduce machine power output and eventually compromises the integrity of blade surfaces. Coatings are currently used for on shore locations to increase the erosion resistance, yet the life of such coatings in more demanding environments cannot be predicted accurately. The talk summarizes the state of the art in droplet impingement erosion modelling and gives an overview of experimentally validated building blocks of erosion models that can be used to predict the life of the leading edge of coated wind turbine blades. From the reviewed work it is concluded that surface fatigue, as nucleating wear mechanism for erosion damage, can explain erosive wear and failure for brittle and for ductile materials as well. Novel developments to improve the coating stability are discussed as well. This includes alteration of success demanding properties like density, toughness and strength by nanostructuring of the wind turbine coating. This is created by introduction of anisotropic nanoparticles resulting in improved impingement resistance at extremely high nanoparticle loading (20wt.%). Also the introduction of self-healing additives is discussed in order to create a total thermoplastic wind turbine concept.

Authors : 1-Nataliia Imbirovych , 2-Myсhajlo Klapkiv,1- Nataliia Zajchuk
Affiliations : 1-Lutsk National Technical University, Ukraine; 2-Physical-Mechanical Institute named after G.V. Karpenko of NAS of Ukraine, Lviv, Ukraine

Resume : The main purpose of this presentation is a justification of techniques and recommendations of highly profitable industrial production based on plasma-electrolyte technologies with the purpose to protect components against wear. The use of many metals is often limited by their low wear resistance that requires the creation coating hardness on alloys. Competitive with existing methods of surface hardening recently considered a method for creating coatings on valve metals by plasma-electrolyte oxidation as a new technology of intensive anode treatment of metals. Created in this way coatings are close to ceramic polycrystalline structure which are distinguished to possess a high adhesion to the basis, hardness, corrosion and a wear resistance. Technologies on this basis are special high technological and ecologically clean. The process is carried out under the scheme "anode-cathode" in conditions of the surface spark discharges on the processed surface (anode) as a result of plasma-chemical reactions and properties of coatings can be managed by changing composition of the electrolyte and the mode of synthesis. The advantage of this method of protecting metals against wear and aggressive environment is the ability to create coatings with predetermined properties. The method of synthesis and technologies of ceramics-oxides coatings in plasma electrolyte are widespread concerning to aluminium alloys, but recently in Lutsk National Technical University and Physical-Mechanical Institute named after G.V. Karpenko of NAS of Ukraine began its popularisation also to zirconium, magnesium and titanium alloys.

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Authors : M. Pelletta, P. Siffalovic, M. Hodas, Y. Halahovets, K. Vegso, M. Jergel, I. Matko, Z. Zaprazny*, D. Korytar*, J. Keckes**, Thomas Dick***, and E. Majkova
Affiliations : Institute of Physics, Slovak Academy of Sciences, Dubravska cesta 9, 84511, Bratislava, Slovakia; *Institute of Electrical Engineering, Slovak Academy of Sciences, Dubravska cesta 9, 84104, Bratislava, Slovakia; ** Department of Materials Physics, Montanuniversität Leoben, Jahnstrasse 12, 8700 Leoben, Austria; *** tortuetec GmbH, Goldschlagstrasse 172, 1140 Wien, Austria;

Resume : The single-point diamond processing (SPDP) technology can be extended to cost-effective production of the X-ray diffractive and reflective optics. We present two examples of Ge-based X-ray optics: a) SPDP channel-cut monochromator based on asymmetric/symmetric diffraction and b) multilayer mirror (Mo/Si) deposited on SPDP Ge substrate. We show that the final roughness of Ge surface after SPDP can be lower than 0.5 nm (RMS). On the other hand, SPDP creates a sub-surface damage of the crystal lattice, forming a 30 nm thick amorphous Ge layer as verified by the transmission electron microscopy. To increase the Ge surface chemical stability, we deposited a 5 nm thick B4C layer. The passivated Ge surfaces exhibit enhanced resistance against oxidation in the presence of the ionizing X-ray radiation. The X-ray photoelectron spectroscopy, atomic force microscopy, imaging ellipsometry and confocal micro Raman spectroscopy were employed to study the impact of the ionizing X-ray radiation on the surface quality and sub-surface damage of the bare and protected Ge surfaces. The deposition of multilayers for the soft and hard X-ray reflective optics requires superpolished surfaces with a roughness below 0.3 nm RMS. The conventional surface form shaping and polishing technology to produce superpolished substrates is time-consuming and expensive. We show that SPDP can be used to fabricate a free form surfaces suitable for deposition of the reflective X-ray optics. Here, a thick B4C buffer layer was deposited prior to multilayer deposition in order to lower the roughness spectrum at high spatial frequencies. Using the X-ray reflectivity and diffuse scattering we compare the Mo/Si multilayer mirrors deposited on a conventional superpolished substrate and on the SPDP figured substrate.

Authors : Ching An Huang, Yu Hu Yeh, Fu-Yung Hsu*
Affiliations : Department of Mechanical Engineering, Chang Gung University, Taoyuan, 333 Taiwan; * Department of Materials Engineering, Ming Chi University of Technology, New Taipei 243, Taiwan

Resume : Few-micrometer-thick alkaline Cu-, alkaline followed acidic Cu-, Cr-C/Cu- and Ni/Cu-coated AZ61 fatigue specimens were prepared and their low-cycle fatigue fracture behavior was studied. Experimental results show that the number of cycles to fatigue failure gradually decreased when the AZ61 specimen was electroplated with alkaline Cu, and alkaline Cu followed acidic Cu coatings. Electroplating a Cr-C coating on Cu-coated AZ61 regains its low-cycle fatigue resistance, although some cracks perpendicular to applied stress were developed in the as-plated Cr-C coating. Whereas, electroplating a Ni on the Cu-coated AZ61 decreases its low-cycle fatigue resistance regardless of having a crack-free surface. This would be attributed to developing a relatively large tension stress after Ni electroplating. A large area of fracture plateau was observed from alkaline Cu, and alkaline Cu followed acidic Cu coated AZ61 specimens after low-cycle fatigue test. In these specimens, fatigue cracks initiate in the interface between Cu and AZ61, obvious decreasing their low-cycle fatigue resistance. On the other hand, an uneven fracture surface with step feature was seen from uncoated and Cr-C/Cu-coated AZ61 specimens in them fatigue cracks initiate directly from the outer surfaces of the specimens. Although cracking initiates from outer surface, a large fracture plateau was found from Ni/Cu-coated AZ61 after low-cycle fatigue test, leading to decrease in its fatigue resistance.

Authors : Bissannagari Murali, Jihoon Kim,
Affiliations : Kongju National University

Resume : We successfully printed NiZn-ferrite films by inkjet printing technique. In order to realize the uniform inkjet-printing of NiZn-ferrite films, a theoretical model was employed to predict the optimal ink-droplet pitches for the inkjet-printing of uniform lines. This model also contributes to the formation of uniform films since they were filled with the inkjet-printed lines. The inkjet-printed NiZn-ferrite films were annealed at various temperatures from 700-1000oC. Theses sintered NiZn-ferrite films were detached from the original rigid substrates and embedded into flexible polymeric substrates.Structural and Magnetic properties were studied before and after bending films using varies analyticinstruments such as X-ray diffraction, Field-emission SEM, vibrating sample magnetometer (VSM),and impedance analyzer.

Authors : M.Grechanyuk., V.Skorokhod
Affiliations : Frantsevich Institute for Problems of Materials Sciences of National Academy of Sciences of Ukraine

Resume : The report will address some of today's trends in the development of electron beam technology. Among them: 1. Electron-beam deposition of coatings on gas turbine blades and other products. 2. The electron beam deposition of wear-resistant and high-solids coatings on tools, dies, molds, etc. 3. Receiving of nanocrystalline type composite materials based on the of copper, molybdenum, tungsten and chromium for electrical contacts and electrodes. 4. Receiving target of the chromium for subsequent magnetron sputtering. 5. Receiving of special metal and ceramic powders for plasma deposition of coatings. 6. Receiving of using electron beam melting of special heat-resistant and heat- resistant alloys for the needs of aviation technology. 7. Receiving of polycrystalline solar silicon from metallurgical silicon. 8. Pilot samples of modern industrial and laboratory electron-beam equipment for the implementation of the above tasks.

10:30 Coffee break    
Authors : L. Nadaraia, N.Jalabadze, L. Khundadze.
Affiliations : Georgian Technical University, Republic Center for structural Research, Georgia, Tbilisi.

Resume : Abstract— Widely known class of Ultra-High Temperature Ceramic (UHTCs) materials represents borides and carbides of transition metals Ti, Zr, Hf. These materials are characterized by high melting temperature, hardness, wear-resistance, and satisfactory strength at high temperature and corrosive resistance. In the presented work were produced and studied the following ceramic materials: TiB2, ZrB2, HfB2, TiB2-TiC, Ti3SiC2. In spite of their excellent properties, carbides have been hardly developed on an industrial scale due to the high cost of the raw materials and of processing and sintering. The high melting point makes them difficult to sinter. Thus, pure carbides have been sintered with spark plasma sintering (SPS). Rapid, low-temperature sintering cycles allow to control grain growth processes and to prepare even pure nanocrystalline powder of UHTCs. In addition, the method contributes to the formation of powder without excessive carbon. After investigation of structural conditions of bulk pieces by XRD and SEM the best working conditions for SPS process were determinate. Structure, physical-chemical, mechanical and performance properties of the elaborated hardmetals were investigated and their industrial testing was performed. Our approach for improving sintering quality, performance properties of the product and for eliminating porosity is use of ultrasonic excitation and AC current during the SPS process.

Authors : O. Grigoriev (1), L. Silvestroni(2), I. Neshpor(1)
Affiliations : 1-Frantsevich Institute for Priblems of Materials Sciences of NAS of Ukraine, Kiev,Ukraine; 2-Institute of Science and Technology for Ceramics of National Research Council of Italy, Faenza, Italy

Resume : The oxidation behavior of ZrB2-based ultra-high temperature ceramics with different sintering additives at temperatures of 1250°C, 1550°C, 1650°C in the air, during 15 min. has been investigated.The ceramics have been produced by hot-pressing and vacuum hot-pressing methods. On the most resistant composites, cyclic oxidation was performed in the same furnace at temperature of 1650°C, so that the best UHTCs underwent 3 cycles at 1650°C for 15 minutes each. On these specimens, the microstructural modifications induced by oxidation were evaluated by x-ray diffraction and by scanning electron microscopy coupled with energy dispersive x-ray spectroscopy on the surfaces and fractured cross-section. Oxidation tests performed in a bottom-loading furnace at 1650°C for 15 minutes and repeated 1-3 times revealed that ceramics obtained by vacuum hot pressing showed higher resistance to oxidation compared to ceramics obtained by hot pressing, possibly because of higher final density, and the best results are achieved when ZrB2 is sintered with simultaneous MoSi2 and CrB2. The investigations had been supported by FP7 project LIGHT-TPS

Authors : Liu Qu, Kwang-Leong Choy
Affiliations : UCL Institute for Materials Discovery/Department of Chemistry, University College London

Resume : Ionic oxides can be utilized in ultra-high temperature applications such as thermal barrier coatings for gas turbines due to their high melting point and superior thermomechanical properties. (Dy, Ce, Y)-ZrO2 has been synthesized via a solid-state reaction route, followed by the structural characterization using a combination of XRD, SEM, and Raman spectroscopy. The lattice disorder was estimated via the full width at half maximum of Raman spectra. The thermal conductivity was measured at room temperature and the coefficient of thermal expansion (CTE) was measured up to 1000°C. It is discovered that the addition of Dy3+ ions and Ce4+ ions lowered the thermal conductivity and enhanced the CTE of the ionic oxides, thus making these materials attractive for high temperature applications.

Authors : Uvarova I., Kud I. , Ieremenko L. , Likhodid L. , Zaytkevich D.
Affiliations : Frantsevich Institute for Problems of Materials Sciences of NAS of Ukraine

Resume : The main characteristics that determine the use of refractory materials under extreme conditions at high temperature in aggressive media are heat and oxidation resistances. The aim of the work was to study process of oxidation of compact MoxCrySi2 samples in air during heating 800-1600oC under thermal shock loading. The furnace SNOL-1,8.3.1,8/14-ТRP08-ТP working at 800-1200оС and optical furnace «URAN-1» at 1600°С were used for tests of heat and oxidation resistances in air. The sample surface after testing was examined by scanning electron microscopy (SEM) on a microscope «Superprobe-733» as well as by scanning probe microscope «Solver Pro-M». As the obtained results for high temperature oxidation resistance (change in mass due to oxidation, %) were established that the MoxCrySi2 samples have better oxidation resistance than that of the MoSi2 samples. In particular, the oxidation resistance of the solid solutions Mo0.6Cr0.4Si2 and Mo0.9Cr0.1Si2 was two and ten, respectively, times that of the MoSi2 samples. Microscopic examination revealed that MoSi2 samples (whose maximal degree of oxidation during the test was 0.0572 %) were characterized by the presence of significant defects in the form of branched deep 25 mcm wide cavities and a microscopic net of to 1 mcm tracks. The microscopic examination of the Mo0.9Cr0.1Si2 sample surface after high temperature tests did not reveal any mechanical defects. The surface morphology indicates formation of a continuous glasslike protective film on the basis of complex silicides of molybdenum and chromium, which preserves its strength in the low temperature region. The high oxidation resistance (+0.0094 %) of the Mo0.9Cr0.1Si2 samples under the “hard” test conditions is explained by formation of a self-passivating protective film which preserves its properties under rapid heating/cooling. Consequently, the obtained results made it possible to conclude that the developed solid solutions MoxCrySi2 possess higher properties (heat and oxidation resistance) compared to MoSi2. Hence the solid solutions Mo0.9Cr0.1Si2 and Mo0.6Cr0.4Si2 can be recommended for application as oxidation-resistant materials at high temperatures, namely to 1600°С and 1400°С, respectively.

12:15 Lunch break    
Authors : T. Konstantinova, O. Gorban, I. Danilenko
Affiliations : Donetsk Institute for Physics and Engineering named after O.O.Galkin NAS Ukraine

Resume : Possibility increasing of nanocomposites property as it known is limited by the problem a uniform distribution of the nanopowders in matrix. In this work we propose new approach to design of oxide ceramic-ceramic nanocomposites what substantially different from the method of mechanical mixing components of the composite. The first step of this approach is developing the technology of multicomponent nanopowders. The developed technology ensures the soft agglomerates, specified size and allows entering low concentrations metal oxide dopants by modification of cation sublattice. It is established on the example of zirconia that even a slight amount of chromium, aluminium, copper and oxides leads to a significant change of the nanopowders and ceramics properties The second step of creating nanocomposite is the high pressure compacting process. The behaviour of dopped nanoparticles under high pressure is difference in comparison with nondopped particles due to change of its surface state and because compacting process is demanded of optimization in the level of high pressure. The third step is the more important, this is sintering. In ternary systems detected competition between components of composites lead to an increase in the concentration of the cation dopant on the surface of zirconia nanoparticles. Heating provides modification of nanoparticles and granules surface by doping of cations, and at determine temperature on the boundaries of grains may be oxide precipitations which ensure subsequently forming uniformly finely distributed filler phase in the matrix. Obtained in this way nanocomposite materials have increased by 1.8 times and fracture toughness increased 2 times resistance to low temperature degradation.

Authors : L. Kernazhitsky (1), V. Shymanovska (1), V. Naumov (2), P. Smertenko (2), V. Skryshevsky (3)
Affiliations : (1) Institute of Physics, (2) Institute of Semiconductor Physics, (3) Institute of High Technology Taras Shevchenko National University

Resume : Nanostructured titanium dioxide (TiO2) is one of the most promising materials in the family of metal oxides semiconductors that characterized by unique properties and capabilities for various energy and environmental applications, particularly, in extreme terrestrial or extraterrestrial environments. To expand TiO2 photocatalytic activity from the UV to the visible range of solar spectrum, TiO2 usually modified with transition metals. However, different nanostructures prepared by different methods often show different characteristics [L. Kernazhitsky et al. (2013) J Solid State Chem 198:511]. We have prepared a set of high-purity fine-dispersed TiO2 nanopowders in single-phase anatase and rutile crystal forms, synthesized by thermal hydrolysis and doped with different transition metal cations Cr3+, Fe3+, Co2+, Cu2+ by the surface adsorption. Pure and doped TiO2 samples were studied by electron microscopy, X-ray diffraction, X-ray fluorescence, Raman spectroscopy, optical UV-VIS absorption, photoluminescence, and electrical C-V measurements. According to structural and morphological analysis, average sizes of nanocrystallites were 10-15 nm for anatase and 15-30 nm for rutile; specific surface areas were 15-30 m2/g for rutile and 100-120 m2/g for anatase. The band gap values varied between3.25-2.9 eV for anatase and 3.0-2.9 eV for rutile. Electronic, optical and photocatalytic properties of pure and doped TiO2 structures are analyzed in details in the light of the data obtained by various experimental characterization techniques. Mechanisms of injection transport are discussed in comparison with available models. The results demonstrate a clear difference between doped and undoped TiO2 compounds. Research is in progress. Support of the FP7 project FOTONIKA-LV is gratefully acknowledged

Authors : 1-Ievgen Solodkyi, 3- Hanna Borodianska,2- Yoshio Sakka, 5-Petre Badica, 4-Oleg Vasylkiv
Affiliations : 1-National Technical University of Ukraine “KPI”; 2- National Institute for Materials Science, Tsukuba, Japan; 3- Frantsevich Institute for Problems in Materials Science, Kiev, Ukraine; 4-Nanyang Technological University, Singapore; 5-National Institute of Materials Physics, Romania

Resume : Boron suboxide (B6O) is a light weight material and has promising physical and chemical properties such as high hardness, high thermal conductivity, good chemical inertness, and excellent wear resistance. However, pure material with a high crystal quality and high oxygen doping level (i.e. x=1 in B6Ox) is difficult to fabricate by ambient pressure methods in contrast to more successful high pressure methods. Apart from these problems addressed in the previous paragraph with phase purity and quality, B6O is also a difficult-to-sinter material. Pressure assisted methods moderate pressures (usually less than 100MPa), hot pressing (HP), and spark plasma sintering (SPS) were applied to obtain dense samples. In all these situations, B6O powders were used and they were prepared before sintering, i.e. processing was made in two separate steps (ex-situ route). In this work we propose and demonstrate formation in one processing step (in-situ route) of dense single phase B6O ceramic of good quality by reactive SPS applied on mixtures of B2O3 and amorphous boron (aB). The Rietveld refinement of the XRD patterns indicates that the oxygen occupancy of B6Ox is reasonably high at x=0.89(99). As-prepared B6O dense ceramic has Vickers hardness (36.7±1.2 GPa) and fracture toughness (K1c=4.2±0.15 MPa.m1/2) comparable with the highest values reported in literature for the bulks obtained by processing routes of already reacted B6O powders (ex situ routes).

Authors : K.Agroui (a), G.Collins (b) and I.Ziane (a)
Affiliations : (a) Semiconductors Technology for Energetic Research Center (CRTSE) 2, Bd. Dr. Frantz Fanon, BP 140 Alger 7 Merveilles, Algiers, (b) Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA

Resume : The crystalline silicon photovoltaic (PV) module is a laminate assembly composed essentially of polymer materials with widely varying thermal properties. The properties of these materials are important factors influencing the performance and reliability of PV modules following exposure to external mechanical stress. In general, encapsulant polymers are designed for a certain range of operating temperatures where they possess desired properties; it is therefore suitable that the polymer?s glass transition region is outside the range of operating temperatures. Generally, the region between 0?C and -40?C is called the glass transition region and the selection of encapsulant materials is based on very low glass transition temperature (Tg). Low temperature phase transition behavior in polymers is important, because this transition has a strong impact on materials mechanical properties and PV module encapsulation reliability. Poly-Vinyl-Butyral (PVB) is increasingly assuming the leading role among alternative encapsulation materials for solar cells as the alternatives to Ethylene-Vinyl-Acetate (EVA). The aim of this work is to analyze the changes in the relevant thermal behavior of PVB encapsulant material as a new emerging material over a broad temperature around Tg by DSC, TSC, and DMTA thermal analysis. Special interest will be focused on the specific TSC relaxation parameters like activation energy and relaxation frequency determination by using the initial rise method.

Authors : Elena R. Andrievskaya (1, 2), Оlga V. Chudinovich (1), Oksana A. Kornienko {1), Yuriy. V. Yurchenko (1)
Affiliations : (1)Frantsevich Institute for Problems of Materials Sciences of National Academy of Sciences of Ukraine; (2)National Technical University of Ukraine “Kiev Polytechnic Institute”

Resume : Systems with yttria, lanthana and ytterbia are perspective for the development of transparent ceramics, laser and other optoelectronic components, ceramics for the intermediate temperature solid oxide fuel cells with high ionic conductivity. Yttria (Y2O3) based solid solutions demonstrate high light transmission in the visible and IR- parts of spectrum, high melting temperature, thermal stability, good mechanical and electro-conductive properties to apply it as laser matrices and lenses. Lanthana (La2O3) based solid solutions are transparent enough in the wide optical diapason to be used in optoelectronic devices. Ytterbia (Yb2O3) based solid solutions show scintillating properties (fluorescence) which interesting for applications in the technology of optical fibers, as well as such materials as solar panels, lasers and irradiation sources for portable x-ray devices. The complex oxide compounds LnLnʹO3 (Ln, Lnʹ = rare earth) with perovskite-type structure possess various electric (high dielectric constant), magnetic and optical properties (non-isotropic optics). The objective of this work is to investigate the phase relations in the binary La2O3-Yb2O3 and ternary La2O3-Y2O3-Yb2O3 systems at 1500 °C in air in the whole concentration range. Powders of La2O3, Yb2O3 and Y2O3 (99.99 %) were used as raw materials. The samples were prepared in steps of 1 and 5 mol % from nitrate solutions with their subsequent evaporation and decomposition at 1000 °C for 2 h. Thermal treatments were carried out in the furnaces with heating elements based on H23U5T (1100 °C for 120 h) and MoSi2 (1500 °C for 50 h) in air. The phase compositions were investigated by X-ray diffraction, petrography, microstructural phase and electron microprobe X-ray analyses. The study of solid state reaction of La2O3 and Yb2O3 at temperature 1500 °С showed that three types of solid solutions based on hexagonal modification of A-La2O3, cubic modification of С-Yb2O3 and intermediate phase with perovskite-type structure of LaYbO3 (R) with rhombic distortions in the La2O3-Yb2O3 system are formed. These solid solution regimes were separated from end to end with the two-phase fields: (A + R) and (C + R). The boundaries of the homogeneity fields for the solid solutions based on A-La2O3, С-Yb2O3 and LaYbO3, as well as lattice parameters of the unit cells for solid solutions were determined. The refined solubility of Yb2O3 in A- modification of La2O3 is about 9 mol % at 1500 °C (50 h). The lattice parameter of the unit cell varies from а = 0.6523 nm, с = 0.3855 nm in pure La(OH)3 to а = 0.6557 nm, с = 0.3864 nm in the sample containing 55 mol % La2O3-45 mol % Yb2O3. The solubility of La2O3 in cubic С- modification ytterbium oxide attain ~2 mol % (1500 °С). The lattice parameters of the unit cell C phase varies from а = 1.0432 nm in pure Yb2O3 to а = 1.0453 nm for the solid solution of boundary composition. It has been found that the boundaries of the R- phase homogeneity field in the concentration range of 48-56 mol % Yb2O3. The lattice parameters of the unit cell R phase varies from а = 0.6015, b = 0. 5805, с = 0.8438 nm in single-phase sample, containing 50 mol % La2O3-50 mol % Yb2O3 to а = 0.6033, b = 0. 5846, с = 0.8395 nm in two-phase sample (R + С), containing 40 mol % La2O3-60 mol % Yb2O3. In the ternary system La2O3-Y2O3-Yb2O3 continues solid solutions based on С modifications of yttria and ytterbia, as well as intermediate phases LaYO3 (LaYbO3), and boundary fields of solid solutions based on hexagonal (А) and monoclinic (В) modifications La2O3 at 1500 °С were determined. This work has been funded by project (AFOSR) STCU Р513 (2012-2014)

15:30 Coffee break    
Authors : I.Bilan.,L.Chernyshev.,N.Fedorova
Affiliations : Frantsevich Instittute for Problems of Materials Sciences of NAtional Academy of Sciences of Ukraine

Resume : Two classes of materials used for reused space apparatus had been analysed. First one - is metallic materials on the base of Ni and Nb. Second one - is ultra high temperature ceramics on the base of sirconium diboride. Their service parameters and perspectives of their applications had been discussed

Authors : Oleksandr Povstyanoy, Viktor Rud, Viktoriya Shiberko
Affiliations : Lutsk National Technical University, Ukraine

Resume : Nowdays, highly competitive market puts forward great demands to increase efficiency and reduce costs in the manufacturing sector. Computer simulation modelling is widely used as a successful tool for design and analysis of the finished product. Distinguished feature of the most common technologies of modern materials science – is the use as a primary feedstock, materials in a granular state. It's not only well-known processes of powder metallurgy, but also powder coating, nanotechnology, etc Creation of new materials from powders with predetermined properties put forward new demands for research and solving of technological tasks. Filling processes, despite its simplicity, depends on particle size distribution of charge, physical and mechanical characteristics of powders, filling method of a volume, dimensions of product and other. Investigation of filling process is possible by several ways: by a natural experiment, computer simulation modelling and etc. Analysis of the modern state of modelling studies in powder metallurgy indicates on a clear trend in description of properties of physical processes on the basis of models of random packing of particles. In Lutsk NTU (Ukraine) was developed a series of computer-simulation models of particle packing for monodispersed and polydispersed case of filling powders.

Authors : Nataliia Imbirovych(1) , Myсhajlo Klapkiv(2), Volodymyr Posuvaylo(2)
Affiliations : (1)Lutsk National Technical University, Ukraine, Lutsk, Lvivska, 75, zip code 43018 (2)Physical-Mechanical Institute named after G.V. Karpenko of NAS of Ukraine, Ukraine, Lviv, Naukova, 5 , zip code 79000

Resume : This work investigates corrosive properties of ceramics-oxides coatings (COC), synthesized on zirconium alloy in aggressive environments such as 10% of HCl and 10% of NaCl. Corrosion resistant of ceramics-oxides synthesized on titanium alloy was studied in the following environments: 80% of H2SO4, 10% of HCl and 10% of HCl + 0,1% of HF. It was investigated corrosion resistance of plasma-electrochemical COC on zirconium and titanium alloys in various corrosive and aggressive environments and also identified their currents of corrosion, which was important on the corrosion rate of alloys. On the rate of electrode reactions that cause corrosion process can be defined by electrochemical studies. Because of that it was studied an electrochemical behaviour of zirconium alloy in the initial state and with ceramics-oxides coatings in acidic environments that are corrosive and aggressive for this alloy. It is known that high corrosion resistance of zirconium and titanium can be achieved by formation of a thin protective oxide film according ZrO2 and TiO2. However, in severe operating conditions and with the presence of particularly aggressive environments (among them, used in this work) these films, due to a small thickness and low hardness, do not provide high anti-corrosion properties. Currents of corrosion of coatings icor , which defined the corrosion rate of material, decreased for all researched systems, and a higher impact of creation of COC is shown in more aggressive environments. The analysis of the obtained polarization curves show that formation of COC affects electrochemical corrosion parameters of zirconium alloy, other words a corrosion currents value is reduced. This change is explained by a lower dissolution of alloy components. Corrosion potential of corrosion fragile zirconium alloy due to an influence of a solution of 10% of HCl is negative - 370 mV, and the corrosion current - 80 mA/m2. The use of titanium alloys in aqueous solutions of sulphuric and hydrochloric acids of high concentrations requires a corrosion protection, due to the loss of protective properties of natural oxide films. In the aggressive environment of 80% of H2SO4. Corrosion current COC depending on raw alloy decreases under 0.09 A/m2 and 0.9 A/m2. Thus, the electrochemical measurements showed that COC increase corrosion resistance of zirconium and titanium alloys on 1...3 orders. Anti-corrosion effect of coatings increases with increasing of aggressiveness of corrosive environment.

Authors : V.Zinchenko(1),E.Chygrynov(1), O.Mozkova(2)
Affiliations : (1)A.V. Bogatsky Physico-Chemical Institute of NAS of Ukraine; (2)State Enterprise for Special Instrument Making "Аrsenal"

Resume : Film-forming materials (FFМ) are used as initial substances for obtaining coatings by so-called PVD (Physical Vapor Deposition) method more often. In a CVD (Chemical Vapor Deposition) method the coating is formed in a course of gaseous reactions between volatile components. Earlier we developed composite FFМ on the basis of system ZnS-Ge, evaporating congruently at rather low temperatures. Here we represent the evaporation mechanism in vacuum and condensation on a substrate of this material. It combines in itself the features of both PVD, and CVD processes. The calculated value of conditional temperature (Ta=TP≈1.33Pa) for a composite (590°С) is much lower, than for ZnS (820°C) and for Ge (1410°C). Thus, according to XRDA, the nano-composite type coating occurs though the initial material being microcrystalline. It makes possible to improve essentially optical and operational (especially, mechanical durability) parameters of coatings and to expand domain of transparency of Ge up to the border of a visible range of a spectrum. The materials evaporating and condensed in a similar way are named CVD-composites. In addition to their application as FFМ of new type, they are used, for example, in a finishing stage of a way of deep clearing of zinc sulfide from oxide admixture. In it surplus of the sulfidizing agent, Sb2S3 is eliminated by processing by an additive of disperse Ge. By the way Sb2S3-Ge composite makes it possible obtaining coatings with much higher mechanical durability in comparison with a coating produced from pure Sb2S3. Other CVD-composites as FFМ on the basis of binary compounds are investigated also, namely: ZnSe-Ge, Sb2Se3-Ge, In2Se3-Ge, EuS-Ge, EuSe-Ge, ZnO-Ge, GeO2-Ge, and SnO2-Ge. Their considerable part has shown also high level of optical and operational parameters of coatings. It is supposed to expand circle of FFМs of CVD-composite type, using complex oxide as one of components that allows hoping that it should be possible to deposit nano-composite coatings with electro-conductive properties in a soft technological mode.

18:00 Best Student Presentation Awards Ceremony and Reception (Main Hall)    
Start atSubject View AllNum.
09:00 Plenary session - Main Hall    
12:30 Launch break    
Authors : Dong Xuecheng, Jin Hongmei, Ye Jun
Affiliations : Agency for Science, Technology and Research (A*STAR)

Resume : The aim of our research work is to understand the interfacial bonding and adhesion failure issues between aerospace primer and anodized Al substrate. Our latest development in simulation and modeling of the primer adhesion has visualized the evolution of the interfacial structure at a molecular level when a pulling force is applied. The simulation model is established on the basis of current practice in surface treatment for aerospace aluminum alloys, so we selected Type II anodizing process and a commercial epoxy-polyurethane primer with chromate pigment. Characterization results on the composition, morphology and aging effect of the substrate, primer and interface are used as guideline for generating a reasonable model. Based on the simulation model of the interface evolution, we notice that the separation between the primer and the anodized Al surface can initiate within a weak polymer structure near the anodized Al surface rather than absolutely between the polymer-substrate interface. Our simulation model further suggests the weak polymer structure is due to the insufficient cross-linking between HDI (hexamethylene diisocyanate) when it is close to anodized Al surface. In lack of sufficient cross-linked network, the weak polymer structure is relatively easier to elongate under external force or swell in the presence of moisture, eventually leading to adhesion failure. We will share in this paper our research results, simulation models, as well as future plan and suggestions to the primer formulation to improve the adhesion strength.

Authors : Jin Hongmei 1, Ye Jun 1, Dong Xuecheng 2 and Zheng Jianwei 1
Affiliations : 1 Institute of High Performance Computing, 1 Fusionopolis Way, Connexis, Singapore 138632. 2 Singapore Institute of Manufacturing Technology, 71 Nanyang Drive Singapore 638075

Resume : Chromate conversion coatings were the mostly used and reliable pre-treatment for aerospace aluminium alloy in the past. However, due to environmental concerns, fully-chromate-free protection schemes including anodizing, sealing and paints have become more desirable as an alternative surface pre-treatment. Although various efforts have been made to eliminate chromate from anodizing, sealing to paint studies on fully-chromate-free schemes have shown that in the multi-layered protection system without chromate, the interfacial adhesion will degrade faster when the sample under aging or corrosion conditions. To understand the adhesion failure mechanism as well as to provide suggestions for further improvement, we have used a Density Functional Theory (DFT) approach in this study to understand the interactions between polymer fragments and various sealing substrates. We studied polymer fragments including hexamethlene diisocyanate (HDI), methylene diphenyl diisocyanate (MDI) and tetra-di-glycidyl ether bisphenol A (t-DGEBA), which represent the major backbone of epoxy-modified polyurethane. The pure -Al2O3, hydroxylated -Al2O3 and Ni(OH)2 surfaces were generated to represent the non-sealing, hot water sealing and nickel acetate sealing surfaces, respectively. The interfacial adhesion energies between polymer fragments and different substrates were calculated. Results show that the adhesion energy is in the order of HDI>t-DGEBA>MDI. In addition, adhesion energy with nickel acetate sealed surface is much larger than that of other surfaces. The larger adhesion energy was mainly due to the significant modification of surface structures. These results may suggest that in order to have a stronger adhesion, HDI component should be increased and MDI component should be decreased during paint formulation. In addition, since Ni atoms tend to cluster together and form much stronger bonds with polymer fragments, the distribution of Ni within the anodized surfaces should be uniform. Otherwise, it may induce stress and have adverse effects.

Authors : O. Smorygo 1, A. Marukovich 1, V. Mikutski 1, A. Ilyushchanka 1, A. Pramono 2
Affiliations : 1 Powder Metallurgy Institute, Minsk, Belarus 2 Research Centre for Metallurgy and Materials, Indonesian Institute of Sciences (LIPI), Kawasan Puspitek 470, Serpong 15314, Banten, Indonesia

Resume : Cellular vitreous carbons (vitreous carbon foams) have been finding extensive applications in various industries as the aerospace super-light components, high-temperature components for vacuum technique, flow through electrodes, catalyst supports for the electrocatalyst processes, bioscaffolds. The large area of very different potential applications is explained by outstanding combination of properties of vitreous carbons: stability in the air-free atmospheres at temperatures of above 2000oC, intertness towards acids and alkali, high theramal- and electric conductivity, low thermal expansion, and reasonable strength0to-weight ratio. Two alternative methods were used to synthesize the cellular vitreous carbons: the sacrificial template method and the polyurethane foam replication method. Phenolic and epoxy resins were used as the carbon precursors; the precursors were converted to disordered (“glassy”) carbon by pyrolysis in the nitrogen flow at 1000-1100oC. No remarkable microstructure differences were stated depending on the precursor type and the synthesis method. Materials exhibited excellent resistance in aggressive solutions: HF, H2SO4, NaOH, H2CrO4. The cellular carbon pore structure and properties (mechanical strength, modulus, electric- and heat conductivity, hydraulic permeability) were dependent on both the synthesis method and porosity. Approaches to control final porosity of the cellular carbons were studied. Support of Belarusian Republican Foundation for Fundamental Research (Project T13INZ-001) is gratefully acknowledged.

Authors : Bechke К.V.; Sanin А.F.
Affiliations : Gonchar Dnepropetrovsk National University, Ukraine

Resume : Construction materials for aircraft and space technique must possess high mechanical properties, in particular by the yield strength, plasticity, specific strength. The dispersion-hardened aluminium alloys, which promote hardening mainly by structural factors, occupy highly important place among these materials. Dispersed strengthening was studied at this work on aluminium alloy additionally containing 1% Fe. For receiving oversaturated solid solution of iron in aluminium it is necessary to use the cooling rate at crystallization more than 105…106 К/s. When melt is water-atomized, the particles are cooled down at 106 K/s. As metal droplets are crystallized, an abnormally oversaturated solid solution of iron in aluminum forms and a superfine intermetallic phase may develop in subsequent treatment. Iron aluminides in pressed parts are formed at heating to the temperatures 4500С. Particles of indicated phases are evenly distributed over the material volume. After hot working the high dislocation density is formed in the alloy structure. The cellular substructure whose boundaries are fixed by superfine particles forms after quenching. Exactly this structure ensures dispersion hardening. Stress-strain properties of received alloy: σВ = 435-450 МPа, δ = 8,6-10,8 %.

Authors : Oleksandr Povstyanoy, Viktor Rud', Tetyana Gal'chuk
Affiliations : Lutsk National Technical University, Ukraine, Lutsk, Lvivska, 75, zip code 43018

Resume : The purpose of work consists in a construction most close to the real process of grinding down, mathematical model. This model will allow: to define the optimum modes of work of bullet mill; to foresee descriptions of products of grinding down on the known descriptions of entrance material and modes of work of mill. It is of interest to trace an experimental way after the changes of grinding down of remain depending on his amount in a mill. Grinding down behaves to the number of basic technological processes of utilization of polishing wastes. An operation this grinding down is a process of mechanical destruction of particles of powders of steel of ШХ15, intended for the maximally possible grinding down of initial particles and giving them of regular form. Adjusting of cycle of grinding down is taken to providing of burst performance of mill at the set craniometrical description of the ground up class. The results of all of the subsequent processing of product depend from the high-quality quantitative indexes of grinding down, foremost, such as, homogeneity of properties on a volume, productivity of process of receipt of the finished products. Consequently, object of mathematical design is a bullet mill in an aggregate with the process of classification. At a design the followings assumptions are accepted: division of particles in a mill and on control riddles accepted even on all of surface, efficiency of classification is the size of permanent and doesn’t change in time. The algorithm of decision of mathematical model includes determination: differential equalization determining kinetics of process of grinding down, and equalization of financial balance on mass on the stage of classification.

15:30 Coffee break    
Authors : (1)I.Bilan.(2) D.Avetisian
Affiliations : (1)Frantsevich Institute for Problems of Materials Sciences of National Academy of Sciences of Ukraine (2) Taras Shevchenko Kiev National University

Resume : The place of thematic topic connected with materials and coatings to be used in extreme environments in new Horizon 2020 calls of three thematic priorities Nanomaterials, nanotechnologies and new production technologies, Energy and Space had been analysed. The main technical requirements and areas of their applications had been discussed

Authors : K.N. Ivanenko
Affiliations : Chernigiv National Technological University

Resume : This work is devoted to the development and scientific ground of the complex system of security resource saving and technogenous safety of welding construction exploitation in ecologic dangerous production with receiving of integrated natural-guarding effect. It is shown, that the rational choice of technology welding (with the adjustable cooling, steel 09G2FB) let a possibility to decrease the integral indexes of contamination environment: soil (Zc), air (ICA), water (ICW), and to increase a corrosion resistance. It is offered the effective coefficient of a resistance of welded joints to a hydrogen degradation, a cracking, a fatigue The prospects of universal manners of decreasing ecodanger of the natural and technological mediums introduction of effective synergist metallochelating composition on the secondary raw materials (production and consumption waste – non-condition on the useful life pharmpreparations) and the modificated them the protection coatings, durable in conditions of cooperated influence of the aggressive mediums and electromagnetic fields have been established. It is permissed in time to prevent risk of technogenous accidents.

Authors : S.D. Tcibula
Affiliations : Chernigiv National Technological University

Resume : This work is devoted to decision ensurity problem of ecological safety and operational reliability pipeline transport (PT) under conditions of ecological break-down technogenous ingredient and energetic contamination. It is developed the unificated complex integral estimate of the ecostate technonatural systems (TNS) with the ecological danger objects by the integrated coefficient of the technogenous-ecological danger Id (for 10 integral coefficients: Ka, Ks, Kw, Kp, Kh, KEMF, Kv, Kr, KCM, KLCF. It is grounded the scientific-methodological fundamentals of increasing of ecosafety pipeline transport, which are founded on the mining models: of the complex system ecological monitoring (I) with determination of integrated indexes ecosafety and the permissible levels of ecodanger technonatural systems with PT; the providing manners of ecooperational reliability PT with the improving ecosafety technological processes by metallurgical and technological methods and universal manners of decreasing ecodanger of the natural and technological mediums, with keep of allowances harmful technogenous influences on the environment, with the mining synergist protection compositions (SPC), modificated protection coatings (MPC) on the secondary raw materials with metallochelating effect (II); of the extended differentiated estimate of protecting action SPC, MPC and synergist additions – SA (6 groups, 33 HTC-compounds), with the providing of the intramolecular and intermolecular synergism (III). Models I-III let possibility realize the preventive action of stabilization and improvement of environment ecostate with technico-economical and social-ecological efficiency: the prevented ecological damages, lifting of the ecological taxes for the environment contamination, economical effects and positive synergist economical effect

Authors : S.D. Tcibula(1), V.G. Starchak(2), H.N. Bobrovnik(2)
Affiliations : 1-Chernigiv National Technological University, Ukraine 2-Chernigiv National Educational University, Ukraine

Resume : It is known that the ecological situation and risk of the technogenous accidents directly are connected with the influence of ingredient and energetic contamination on the operational reliability and ecological safety of the underground, surface, underwater pipeline transport. Therefore integral estimation of the technogenous influence under the combined action of the toxical pollutants (especially heavy metals) is gaining the important significance for the determination of the ecological danger pipelines and methods protection. This paper presents the research results, for example, of the technogenous ingredient pollution by Chernigiv central heating-and-power plant with determination of its integral estimation, taking into account different scientific approaches, especially with consideration of the combined action of the toxical pollutants of 4 groups. The level of danger pollution degree have been determined by the excess ratio of the pollution summaric coefficient relatively to the maximum permissible pollution. It is shown that the integral estimation of the technogenous influence with consideration of the combined action of the toxical pollutants is more informative relatively to the determination of the ecological danger pipeline transport.

17:15 Conclusions, closing of symposium    

Symposium organizers
Valerii SKOROKHODFrantsevich Institute for Problems of Materials Science National Academy of Sciences of Ukraine

3 Krzhyzhanovsky Str. Kiev Ukraine

Mikolaj SZAFRANFaculty of Chemistry Warsaw University of Technology

ul. Noakowskiego 3 00-664 Warsaw Poland

+48 022 660 55 86
+48 022 660 55 86
Thomas Josef GRAULEEmpa Swiss Federal Laboratories for Materials Testing and Research, Laboratory for High Performance Ceramics

CH-8600 Dübendorf Switzerland

+41 (052) 6246281