运用双槽口剪切试验方法测试了碳纤维增强碳基复合材料(C/C)在室温、700℃、1000℃、1400℃下的剪切强度,并用扫描电子显微镜(SEM)观察了材料的原始组织形貌和断口微观形貌.结果表明:材料的剪切强度在一定范围内随温度的升高而增加,材料Z向的剪切强度优于XY向.通过SEM观察分析可知,材料XY向和Z向纤维的含量明显不同;室温下,C/C复合材料的破坏形式有纤维拔出及断裂,而高温下,失效形式主要为纤维的拔出、纤维/基体界面脱粘等.
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