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材料工程  2014 

C/C多孔体对C/C-SiC复合材料制备及性能的影响

DOI: 10.11868/j.issn.1001-4381.2014.07.007, PP. 34-38

Keywords: C/C多孔体,C/C-SiC复合材料,弯曲性能,抗烧蚀

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Abstract:

以准三维针刺碳纤维预制体,经化学气相渗透(CVI)法制备了4种密度的C/C多孔体,利用先驱体浸渍裂解法(PIP)制备了C/C-SiC复合材料,研究了C/C多孔体对C/C-SiC复合材料制备和最终性能的影响。结果表明C/C多孔体密度越低,最终得到的C/C-SiC复合材料开孔隙率及SiC含量较高。SiC的存在使C/C-SiC材料具有较高的弯曲强度,纤维和基体界面也是影响弯曲强度的关键因素,其中密度为1.35g/cm3的C/C多孔体所制备的C/C-SiC复合材料纤维和基体之间形成较好的结合界面,其弯曲强度最大。同时,SiC含量增加可显著提高C/C-SiC复合材料的抗烧蚀性能。

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