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材料工程  2015 

1800℃热处理对PIP法C/SiC复合材料结构和性能的影响

DOI: 10.11868/j.issn.1001-4381.2015.04.017, PP. 98-101

Keywords: C/SiC复合材料,力学性能,微观结构,热处理

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Abstract:

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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