C/C多孔体对C/C-SiC复合材料制备及性能的影响  

Effect of C/C Porous Preform on the Preparation and Properties of C/C-SiC Composites

作　　者：王玲玲[1,2] 马文闵[1,2] 嵇阿琳[1,2] 崔红[1,2] 闫联生[1,2] 黄剑[1,2] 

机构地区：[1]西安航天复合材料研究所,西安710025 [2]高性能碳纤维制造及应用国家地方联合工程研究中心,西安710089

出　　处：《材料工程》2014年第7期34-38,共5页Journal of Materials Engineering

基　　金：国防重大基础科研项目(c0320110006)

摘　　要：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。Carbon fiber reinforced silicon carbide matrix （C/C-SiC） composites were prepared by pre-cursor impregnation pyrolysis （PIP） process, using the four kinds of porous C/C composites with thesame quasi-three dimensional needling preform but different pyrocarbon content filled by chemical va-por infiltration （CVI）. The preparation and final performance of C/C-SiC composites have been inves-tigated. The resullts show that the lower the density of C/C, the higher the open porosity and SiCmatrix content of corresponding C/C-SiC. The existence of SiC matrix improves the bending strengthof the C/C-SiC composite which was influenced significantly by the interfance of the fibers and matrix.The bending strength of the C/C-SiC composites produced of the C/C preform with the density of1.35g/cma is the highest with the excellent fibers-matrix adhesion. It was also shown that with theincrease of the SiC matrix content, the anti-ablative property improves observably.

关 键 词：C C多孔体 C C SIC复合材料 弯曲性能 抗烧蚀 

分 类 号：TB332[一般工业技术—材料科学与工程]