COMPOSITE MATERIAL Russian patent published in 2020 - IPC C01B32/25 C01B32/956 C04B35/565 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry, machine tool, machine building and engine building and can be used in production of friction assemblies, nozzles of sand-blasting devices and parts of engines. Composite material contains, wt. %: 85–90 diamond particles and 10–15 phases of crystalline silicon carbide. Diamond particles consist of at least two fractions, one of which contains particles with diameter of 200 mcm and more, in amount of at least 60 vol. %, at ratio of sizes of small and large particles (1:6)–(1:10). Close-packed diamond particles form a high-strength skeleton frame, when impregnated with the silicon melt between the diamond particles, layers of crystalline silicon carbide are formed, which is obtained by reacting fused silicon with carbon via a Turing-type reaction mechanism.

EFFECT: resulting composite material has a density p = 3_30–3_35 g/cm³; modulus of elasticity E = 740–750 GPa; Vickers hardness HV = 64–65 GPa.

3 cl, 4 dwg, 2 tbl, 2 ex