采用CVD+PIP工艺制备了SiC涂层碳纤维增强SiC复合材料(C/SiC),研究了碳纤维表面CVD SiC涂层的形貌以及涂层对C/SiC复合材料力学性能的影响.结果表明:CVD SiC涂层处理可以填补纤维表面上的沟槽和缺陷,使纤维表面变得光滑,从而使C/SiC复合材料的力学性能有很大提高,碳纤维经过CVD SiC 1 h涂层处理的C/SiC复合材料的力学性能最好,弯曲强度达到511.5 MPa,断裂韧性达到20.8 MPa·m1/2.
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