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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