采用扫描电镜(SEM)和透射电镜(TEM),研究氩气中1800℃热处理对先驱体浸渍-裂解(PIP)工艺制备三维编织C/SiC复合材料结构和性能的影响.结果表明:在1800℃热处理过程中,C/SiC复合材料的界面处发生了碳热还原反应和硅扩散,导致基体和纤维之间产生化学结合,纤维受到损伤;1800℃热处理后,PIP法C/SiC复合材料出现8％的失重率,力学性能急剧下降80％以上,断裂行为由韧性转变为脆性断裂.
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