中文摘要：

原子氧(AO ) 在低地球轨道(狮子座) 被认为最腐蚀的粒子到太空船材料。碳纤维，碳 / 碳(C/C ) ，和某修改 C/C composites 暴露于模仿的 AO 环境在狮子座调查他们的行为。测试的扫描电子显微镜学(SEM ) ， AO 侵蚀率计算，和机械性质被用来描绘材料性质。结果证明碳纤维和 C/C 标本在轰炸的 AO 下面经历重要降级。根据 C/C-SiC 和 CVD-SiC-coated C/C 上的 AO 的效果，一 CVD 原文如此压缩了上衣是一条可行途径保护 C/C composites 免受 AO 的伤害降级。

英文摘要：

Atomic oxygen （AO） is considered the most erosive particle to spacecraft materials in low earth orbit （LEO）. Carbon fiber, car-bon/carbon （C/C）, and some modified C/C composites were exposed to a simulated AO environment to investigate their behaviors in LEO. Scanning electron microscopy （SEM）, AO erosion rate calculation, and mechanical property testing were used to characterize the material properties. Results show that the carbon fiber and C/C specimens undergo significant degradation under the AO bombing. According to the effects of AO on C/C-SiC and CVD-SiC-coated C/C, a condensed CVD-SiC coat is a feasible approach to protect C/C composites from AO degradation.