通过分析失重率、显微形貌变化讨论了原子氧辐照对C/C复合材料以及SiC基体改性C/C复合材料(C/C-SiC)的损伤机制；并通过热膨胀系数(CTE)、热扩散率(TD)以及弯曲强度等性能的变化,进一步讨论了原子氧辐照损伤对材料热物理及力学性能影响.结果表明,C/C复合材料受原子氧辐照损伤是物理化学综合作用,属于冲击诱发-增强表面化学刻蚀；SiC组元表现出良好的抗原子氧侵蚀性能,阻碍了原子氧向材料内部侵蚀,但是SiC组元在更长时间辐照后出现机械破损；C/C复合材料在原子氧辐照下失重率呈线性增加,而C/C-SiC复合材料失重率小于C/C复合材料且增长幅度越来越小；C/C复合材料和C/C-SiC复合材料的整体结构性能在辐照损伤后发生了一定变化.
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