What are the properties and application characteristics of boron carbide ceramics

       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 that 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 seriously 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 a wear resistant coating, heat resistant wear coating.

     Coatings can be prepared by vacuum plasma spraying, supersonic flame spraying and explosive spraying.