| 简介 |
FIELD : chemistry.
SUBSTANCE : invention relates to synthesis of electroconductive metal compounds. Disclosed is a metal boride of the fourth secondary group of the periodic table of elements, the grain size, which is determined through sieve analysis according to the ASTM B 214 standard, of which is at least 40 wt % and particle size of which is greater than 106 mcm. The boride particles consist of grown monocrystalline grains. The method of producing said boride involves reaction of boron carbide with at least one oxide of a metal of the fourth secondary group of the periodic table of elements at temperature higher than 2000°C in the presence of carbon and a salt of an alkali or alkali-earth metal with high boiling point of at least 1800°C with excess boron carbide. The obtained boride can be included in the composition of a surface coating, a cermet and sputtered powder.
EFFECT : invention enables to obtain titanium, zirconium and hafnium borides in form of coarse-crystalline powder with smooth surfaces and rounded edges of particles for increasing wear resistance of ceramic materials produced using such borides.
19 cl, 7 dwg, 1 tbl, 6 ex |
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