BORON SUBOXIDE-BASED COMPOSITE MATERIALS Russian patent published in 2013 - IPC C04B35/01 C04B35/645 

FIELD: chemistry.

SUBSTANCE: boron suboxide-based composite material contains boron suboxide and a second phase in bound form, the second phase containing a boride and uniformly distributed in the boron suboxide. The composite material has crack resistance of more than 3.5 MPa·m^0.5, and hardness of more than 25 GPa. The borides are selected from a group comprising borides of group IV-VIII transition metals and borides of platinum group metals. In particular, the boride can be selected from a group comprising borides of iron, cobalt, nickel, titanium, tungsten, hafnium, tantalum, zirconium, rhenium, molybdenum, chromium, manganese and niobium. The boride can also be a boride of a platinum group metal, preferably palladium boride. Furthermore, the second phase can contain one or more oxides. According to the disclosed method of producing the composite material, a boron suboxide source is brought into contact with a boride or source thereof and the obtained mass is sintered at temperature of 1750-1900°C.

EFFECT: obtaining boron suboxide-based materials with high strength and crack resistance.

22 cl, 22 ex, 1 tbl, 4 dwg