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研究了干氧和湿氧两种气氛、疲劳和蠕变两种应力下C／SiC复合材料在1300℃的应力氧化行为,试验结果和断口形貌SEM分析表明:C／SiC复合材料在疲劳应力下比在蠕变应力下具有更强的抗氧化能力和更长的持续时间;干氧环境中的蠕变试样以C纤维氧化失效为主;水蒸气的存在加剧了SiC基体的氧化,并且使受蠕变应力的C／SiC复合材料以SiC基体氧化失效为主.
The effects of fatigue and creep stress on the stress and oxidation behavior of C / SiC composites at 1300 ℃ were investigated. The SEM and SEM results show that the C / Under the creep stress has a stronger antioxidant capacity and longer duration; creep samples in dry oxygen environment C fiber oxidation failure; the presence of water vapor exacerbated the SiC matrix oxidation, and The C / SiC composites subjected to creep stress were mainly oxidative failure of SiC matrix.