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Information × Registration Number 0224U001842, (0121U107923) , R & D reports Title Scientific and technological bases of synthesis and consolidation of composite materials and coatings in the system Ti-Nb-B-C-Si for work in extreme conditions popup.stage_title Науково-технологічні основи синтезу та консолідації композиційних матеріалів та покриттів в системі Ti-Nb-B-С-Si для роботи в екстремальних умовах Head Zghalat-Lozynskyi Ostap B., Доктор технічних наук Registration Date 31-01-2024 Organization Frantsevich Institute for Problems of Materials Science National Academy of Science of Ukraine popup.description1 Investigation of regularities of phase and structure formation of composite materials based on oxygen-free high melting point compounds (TiB2-MeSi2, Si3N4-MeSi2, where Me - Ti, Nb) and composites reinforced with titanium and niobium carbides during their synthesis and consolidation using hot pressing and spark plasma sintering technologies, as well as obtaining coatings based on them. Determination of physical-mechanical and tribotechnical properties of composites and coatings in the system Ti-Nb-B-C-Si (hardness, high temperature strength, heat-, wear- and corrosion resistance in aggressive environments) depending on their composition and structure. popup.description2 The conditions for the synthesis of composite powders based on TiB2 – TiSi2 with additives of refractory compounds TiC and NbC in the AIR-0.015A planetary mill by the mechanism of mechanostimulated reaction, which allow obtaining homogeneous powders with a particle size of 50-150 nm, were investigated. The peculiarities of the solid-phase interaction of Si3N4 – Nb powder mixtures during heat treatment in a vacuum were studied. Regimes of synthesis of composite powder 86NbSi2–14Si3N4 have been developed, which use the insertion of an excess of silicon nitride compared to the stoichiometric ratio of the components. Electrode materials were produced from synthesized powders by spark-plasma sintering. The method of electrospark coatings deposition on steel and titanium substrates in the range of parameters of the electric pulses energy 0.1-1.1 J with optional laser processing was developed. The hardness of the deposited coatings is 17 GPa at a thickness of 40 microns. It was established that the coating on a steel substrate, obtained by combined electrospark and laser processing, deposited by TiB2+TiSi2+NbC electrode, has the best wear resistance and minimal frictional force when interacting with a hard alloy counterbody. Product Description popup.authors Ostap B. Zhalat-Lozynskyi Poliakov Ihor A. Myslyvchenko Oleksandr M. Lytvyn Roman V. Kovalchenko Mykhailo S. Kud Iryna V. Mediukh Roman M. Liudmyla I. Yeremenko Istomina Tetiana I. Ivan D. Havrysh Belik Vasily D. Dmytro P. Ziatkevych Krushynska Larysa A. Derevyanko Oleksandr О. Derev'yanko Olena V Serhii V. Yarmolinskyi Abdullayeva Elmira R. Pokorskiy Sergiy G. Onyschenko Lina A. Anatolii V. Laptiev Tolochyn Oleksandr I. Hrebenok Tetyana P. Portnov Oleksandr P. Zelenova Alla O. Nina S. Ziatkevych Hrinkevych Kostiantyn E. Tkachenko Ivan Naumenko Vladyslav Yu. popup.nrat_date 2024-01-31 Close