Silicon carbide ceramics possess excellent mechanical properties, oxidation resistance, high wear resistance, and low friction coefficient. Besides, they have good thermal stability, high temperature strength, small thermal expansion coefficient, high thermal conductivity, good thermal shock resistance and chemical corrosion resistance. Silicon carbide ceramics are widely applied in fields such as abrasives, heating elements, protective armors, high-temperature bearings, nozzles, high-temperature corrosion-resistant components and electronic equipment parts.