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Information × Registration Number 0220U101237, 0119U001570 , R & D reports Title Development of protective and radiation-proof composite materials based on ceramic and polymeric fine particles for nuclear power engineering in Ukraine, needs of industry and society. popup.stage_title Head Makara Volodymyr A., Доктор фізико-математичних наук Registration Date 05-01-2020 Organization The scientific and Training Center "Physical and chemical Material Science" popup.description2 Object of study: Ceramic composites based on transition metals and their borides and oxides. Aim of work: Development of composite ceramic materials based on carbides, borides or oxides of transition metals with high radiation protection characteristics and intended to improve the structural elements of nuclear reactors, the needs of industry and society. Research methods: method of mechanochemical synthesis, electron and optical microscopy, X-ray diffractometry, energy dispersion analysis, determination of microhardness and fracture toughness by means of indentation, physical-mathematical modeling, statistical analysis. For the first time samples of nanosized (up to 20 nm) metal-ceramic material Fe-TiC (25 wt.%) Were synthesized by sintering at high temperatures under high pressure (850oC, 8 GPa) of powder made by the method of mechanical alloying in a planetary ball mill of Fe (elemental metals). and Te) and carbon. The positive effect of using carbon nanotubes (CNTs) (instead of other forms of carbon) in the process of mechanical alloying has been established. The real structure and microstructure of the synthesized materials were investigated. Features of the microstructure cause high density of the obtained material and high value of its Vickers hardness (11.3 GPa). CNTs facilitate the grinding process and significantly accelerate the formation of the carbide phase, affect the grinding of the grains of the obtained material and thus provide its seal and improved mechanical characteristics. For the first time, nanosized NiCx carbide was synthesized as a result of mechanochemical treatment in a planetary ball mill of the charge Ni-BHT. It is shown that the nature of the interaction between the starting components and, accordingly, the phase composition of the final synthesis product is significantly influenced by what allotropic form of carbon (graphite or carbon nanotubes) was used to make the charge.  Product Description popup.authors Zahorodniy V'yasheslav V. Kaminsʹka Maryna A. Makara Volodymyr A. Nizhelska Olena I. Shirinian Aram S. popup.nrat_date 2020-04-02 Close