Thermal shock resistance of C/C composites

摘要

C/C composites are one of the most promising materials for structural applications at high temperature owing to their refractory property, lower density, and excellent mechanical properties. Whether C/C composites could suffer catastrophic failure by thermal stress when they subjected to an extremely severe environment is attracting considerable interest. The ability of a material to resist thermal shock damage is usually determined qualitatively by the concept of thermal shock resistance (TSR). In the present paper, strength, conductivity, modulus and coefficient of thermal expansion of graphitized and non-graphitized carbon felt reinforced carbon matrix composites in the temperature range from 25 to 2500 deg C are measured. TSR factors of both composites at various temperatures are calculated using given equation.