Oxidation behavior of C/C composites at low temperature
YIN Jian, ZHANG Hong-bo , XIONG Xiang
(State Key Laboratory of Powder Metall urgy , Central South University , Changsha 410083, China)Abstract: C/C composites are extensively used in the field of aviation and aerospace, however it exists the principal defect of lower low-temperature oxidation-resistant performance, which is closely related with its'matrix materials,therby the oxidation behavior of C/C composites with integrated carbon felts and different matrix in static atmos-phere and flowing oxygen at low temperature were experimentally studied and discussed according to their micro-structure and SEM photos after oxidation. It results in that under 1000 ℃, no matter what kind of oxidation, Oxi-dation of resin-based martrix materials is better than those with pyrocarbon(typical structure of smooth laminar andrough laminar) and resin based carbon. Oxidation would always begin from interfaces, pores and lacunae.
Key words: C/C composites;oxidation at low temperature;oxidation rates