METHOD FOR OBTAINING A CHARGE FOR THE MANUFACTURE OF COMPOSITE CERAMICS BORON CARBIDE - CHROMIUM DIBORIDE Russian patent published in 2023 - IPC C04B35/563 

FIELD: powder metallurgy.

SUBSTANCE: invention relates to powder metallurgy, in particular to the manufacture of composite ceramics boron carbide - chromium diboride, and can be used for the manufacture of cases of high-temperature thermocouples, evaporators and boats for vacuum metallization, pipes for pumping molten metals, sandblasting nozzles, lightweight ceramic armor, anti-friction products. The method for preparing a mixture for composite ceramics boron carbide - chromium diboride is characterised by the fact that the initial components: chromium oxide, boron carbide and nanofibrous carbon are mixed in the following ratio in moles: chromium oxide 1.13; boron carbide 8.88; nanofibrous carbon 2.25 is sieved through a 100 µm sieve and loaded into a quartz reactor purged with argon, which is placed in an induction furnace, while the process is carried out for 10–15 minutes at a temperature of 1600–1700°C.

EFFECT: proposed method is aimed at accelerating the technological process of obtaining a mixture of boron carbide - chromium diboride with a uniform distribution of particles to obtain ceramics with an increased relative density and crack resistance.

1 cl, 4 dwg