| 摘要 |
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, 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 |
