C/C composites are carbon matrix composites reinforced by carbon fiber and its fabric. With a low density (<2.0g/cm3), high strength, high modulus, high thermal conductivity, low thermal expansion coefficient and good friction performance, and good thermal shock resistance, dimensional stability, etc., is now used in more than 1650 DEG C and few alternative materials, the highest temperature reached 2600 degrees in theory, so it is considered to be one of the most the future development of high temperature materials.