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Information × Registration Number 0223U005483, 0123U102959 , R & D reports Title Production and high-temperature properties of poly component ceramic materials based on ZrB2 popup.stage_title Head Vedel Dmytro V., Доктор філософії Registration Date 22-12-2023 Organization Frantsevich Institute for Problems of Materials Science National Academy of Science of Ukraine popup.description2  A solid solution based on zirconium diboride with an additive of 6 and 12 was synthesized % Mo by three methods. The use of pure boron as a reducing agent resulted in obtaining small crystallites with a size of 500-700 nm and a uniform composition. When using B4C, it is necessary to maintain the Zr: B ratio, which allows obtaining crystallites with a size of 1-3 microns. However, using a common reducing agent B4C and C leads to the formation of the (Zr, Mo)C phase, which does not allow obtaining a solid homogeneous solution based on zirconium diboride. The formation of a pure solid solution is possible with an amount of Mo equal to 6 at. %. Optimal from the point of view of the phase composition of ceramics and the chemical composition of the solid solution are powders that were obtained using boron carbide as a reducing agent. When other reducing agents were used, the chemical composition of the solid solution had a different ratio between zirconium and boron in zirconium diboride. The formation of different types and shapes of grains when using different reducing agents and different Mo content in ZrB2 is also characteristic. The use of a boron carbide-reducing agent leads to the formation of crystallites that retain their shape after hot pressing. However, small crystallites are formed during reduction with pure boron, which at high temperatures are more prone to recrystallization than micron particles. Therefore, when using the reducing agent B4C to obtain a homogeneous solid solution from (Zr, Mo)O2 is one of the most promising from the point of view of both chemical and phase composition in the powder mixture and dense hot-pressed material. Product Description popup.authors Vedel Dmytro V. Osipov Anton E. Chudinovych Olha V. popup.nrat_date 2023-12-22 Close