采用单纤维碎断法(Fragmentation)及声发射技术研究了富SiO2处理的SiC纤维增强铝基复合材料经一定疲劳载荷后的界面接合强度.发现疲劳与未疲劳状态对实验机刚度的测量影响极大,这将直接影响纤维断裂强度的计算.采用直接溶出法测量经热压处理的纤维断裂强度,发现复合工艺对纤维的强度没有损耗,这与Clough关系的预测有巨大的差异.经一定周次疲劳后,纤维的临界长度增加,界面接合强度有所降低.
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