Silicon carbide is second only to diamond and boron carbide, and its hardness is as high as HRC60-65. It has high wear resistance, so it is used for sliding parts (mechanical seals, etc.). In addition, it has high Young's modulus and low coefficient of thermal expansion, so it is used in high precision components (optoelectronics, substrate, aerospace technology, etc.)
Because it is a compact sintered body, it can be mirror processed. High temperature resistance above 1400 ℃, thermal shock resistance, excellent chemical stability. Such as silicon carbide hand, silicon carbide sheath, sheet products and thick wall products. Silicon carbide has the characteristics of high temperature oxidation resistance, high temperature strength, small creep, good thermal conductivity, low density and so on, so it is selected as the high temperature component of thermomechanical.