The maximum use temperature of boron carbide?
Boron carbide (B4C) is a black crystalline powder with high hardness, its melting point is 2450 degrees Celsius, and its thermal expansion coefficient is second only to diamond. Low density and lighter than aluminum. The thermal expansion coefficient is small, about 1/2 of steel, and it is a non-conductor. Boron carbide (good corrosion resistance, no reaction with acid and alkali solutions. Oxidation resistance, the maximum use temperature in the air is 1000 degrees Celsius, but it is severely oxidized in the air of 1100 degrees ~ 1400 degrees Celsius.
The boron carbide may react with metals to form metal carbides. Reduce the performance of B4C, so it is not suitable to use metal as the binder phase material of B4C. Can be used as wear resistant coating, heat resistant wear coating.
Coatings can be prepared by vacuum plasma spraying, supersonic flame spraying and explosive spraying.