采用透射电镜研究了SiCf/Super α2复合材料的界面反应及其对抗拉强度的影响.结果表明,制备状态的复合材料的界面反应产物为4层分布,经高温长时间热处理后,界面反应区可分为6层,电子衍射分析和成分分析表明:界面反应产物为TiC,Ti3AlC,Ti3Si和Ti5Si3.界面反应层的加厚服从抛物线规律,是一个扩散控制过程.复合材料的抗拉强度随界面反应层的加厚而下降,计算表明:SCS-6 SiCf/Super α2复合材料的抗拉强度不受影响的临界界面反应区厚度为0.75 μ.m.
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