增密工艺对C/C-Cu复合材料组织和性能的影响-《郑州大学学报(工学版)》

文章信息/Info

Title:: Influence of Densification Process on Microstructure and Properties of C/C-Cu Composites

作者:: 汪涵迪; 张东生; 李江涛; 赵红亮; 吴振卿; 范宇恒; 郑州大学材料科学与工程学院,河南郑州 450001, 巩义市泛锐熠辉复合材料有限公司,河南巩义 451200

Author(s):: WANG Handi; ZHANG Dongsheng; LI Jiangtao; ZHAO Hongliang; WU Zhenqing; FAN Yuheng; School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, Henan, Gongyi City Pan -Rui Yihui Composite Materials Co., Ltd., Henan Gongyi 451200

Keywords:: C /C-Cu composite; densification process; chemical vapor infiltration; precursor impregnation pyrolysis; C /C reinforcement; tensile strength

摘要:: 为了探究增密工艺对 C/C-Cu 复合材料组织和性能的影响，分别采用化学气相渗透( CVI) 和先驱体浸渍裂解转化( PIP) 对 2. 5D 针刺碳毡进行增密处理，得到由热解碳和树脂碳填充的 C/C 增强体，采用真空浸渗工艺制备了 C/C-Cu 复合材料，并对其进行了组织分析和性能测试。结果表明: 采用 CVI 增密制备的 C/C-Cu 复合材料中 TiC 界面层更薄，热解碳对碳纤维起到了较好的保护作用，垂直、平行方向的电阻率分别为 0. 72、0. 63 μΩ·m、压缩强度分别为 367. 61、326. 87 MPa，抗拉强度为 62. 54 MPa，其导电性能、压缩强度、抗拉强度以及塑性均优于 PIP 增密，破坏机制为纤维拔出破坏; 采用 CVI 增密制备的 C/C-Cu 复合材料硬度值为 77. 28 HBW，略低于 PIP 增密( 81. 59 HBW) ，但二者差异较小。综上，CVI 增密工艺更适合用来制备 C/C-Cu 复合材料的 C/C 增强体。

Abstract:: In order to explore the effect of densification process on the microstructure and properties of C /C-Cu composite，the 2. 5D needle-punched carbon felt was densified by chemical vapor infiltration ( CVI) and precursor impregnation pyrolysis ( PIP) to obtain C /C reinforcements filled with pyrolytic carbon and resin carbon，respectively． C /C-Cu composite was prepared by vacuum infiltration process，and the microstructure analysis and performance test were carried out． The results showed that the TiC interface layer in the C /C-Cu composite prepared by CVI process was thinner，and the pyrolytic carbon had a better protection effect on the carbon fiber． The resistivity and compressive strength in the vertical ( parallel) direction were 0. 72 ( 0. 63) μΩ·m，367. 61 ( 326. 87) MPa， respectively．And the tensile strength is 62. 54 MPa． Its electrical conductivity，compressive strength，tensile strength，and plasticity were better than those of PIP process． The failure mechanism was fiber pull-out failure． The hardness value of C /C-Cu composite prepared by CVI process was 77. 28 HBW，which was slightly lower than that of PIP process ( 81. 59 HBW) ，but the difference between them was small． In conclusion，the CVI densification process was more suitable for the preparation of C /C reinforcements of C /C-Cu composites.