致密化工艺对针刺无纬布C/C复合材料性能的影响  

Effect of Densification Methods on Properties of Needled Felt With Non-Woven Cloth Reinforced C/C Composites

作　　者：郑蕊[1,2] 李艳[1,2] 嵇阿琳[1,2] 张国辉[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：《宇航材料工艺》2015年第2期52-54,共3页Aerospace Materials & Technology

摘　　要：比较了两种不同工艺制备的针刺无纬布C/C复合材料。研究表明,在沥青浸渍/碳化之前对针刺预制体进行CVI预增密处理后,其C/C复合材料轴向拉伸强度提高了234%,层剪强度提高了126%;热扩散率明显升高,轴向线胀系数下降,表现出良好的综合性能。In this paper, two processes for preparing needled felt with non-woven cloth reinforced C/C compos- ites are compared. Needled preforms are treated firstly with a CVI pre-densified process, and then the preforms are densified by pitch impregnation/carbonization. The results show that the tensile strength in axial direction is increased by 234%, the interlaminar shear strength is increased by 126%. In addition , the thermal diffusivity is obviously in- creased, while the axial coefficient of thermal expansion （CTE） is decreased. It is concluded that the material has good comprehensive properties.

关 键 词：致密化 针刺无纬布 C/C复合材料 性能 

分 类 号：TB3[一般工业技术—材料科学与工程]