无机材料学报 ›› 2013, Vol. 28 ›› Issue (12): 1338-1344.DOI: 10.3724/SP.J.1077.2013.13110 CSTR: 32189.14.SP.J.1077.2013.13110

• 研究论文 • 上一篇    下一篇

一维高导热C/C复合材料的制备研究

林剑锋1, 袁观明1, 李轩科1, 董志军1, 张 江1, 张中伟2, 王俊山2   

  1. (1. 武汉科技大学 化学工程与技术学院, 武汉430081; 2. 航天材料及工艺研究所, 北京100076)
  • 收稿日期:2013-03-01 修回日期:2013-04-25 出版日期:2013-12-20 网络出版日期:2013-11-15
  • 作者简介:林剑锋(1986-), 男, 硕士研究生. E-mail:linjianfeng20066@126.com
  • 基金资助:

    国家自然科学基金 (91016003, 51372177); 深圳市热管理重点实验室开放基金

Preparation of 1D C/C Composites with High Thermal Conductivity

LIN Jian-Feng1, YUAN Guan-Ming1, LI Xuan-Ke1, DONG Zhi-Jun1, ZHANG Jiang1, ZHANG Zhong-Wei2, WANG Jun-Shan2   

  1. (1. School of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China; 2. Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, China)
  • Received:2013-03-01 Revised:2013-04-25 Published:2013-12-20 Online:2013-11-15
  • About author:LIN Jian-Feng. E-mail:linjianfeng20066@126.com
  • Supported by:

    National Natural Science Foundation of China (91016003, 51372177); Key Laboratory of Thermal Management and Materials of Shenzhen

摘要: 以三种沥青作为基体前驱体, 实验室自制的AR中间相沥青基纤维为增强体, 通过500℃热压成型, 随后经炭化和石墨化处理制备出一维炭/炭(C/C)复合材料。研究了前驱体沥青种类和热处理温度对复合材料导热性能的影响, 并采用扫描电子显微镜和偏光显微镜对其石墨化样品的形貌和微观结构进行表征。结果表明; C/C复合材料在沿纤维轴向的室温热扩散系数和导热率均随热处理温度的升高而逐渐增大; 由AR沥青作为基体前驱体所制备的C/C复合材料具有更加明显的沿纤维轴向取向的石墨层状结构以及最好的导热性能, 其3000℃石墨化样品沿纤维轴向的室温热扩散系数和导热率分别达到594.5 mm2/s和734.4 W/(m·K)。

关键词: 一维高导热C/C复合材料, 热扩散系数, 导热率

Abstract: Three kinds of pitches were used as matrix precursors, the self-fabricated mesophase (AR) pitch-based carbon fibers were used as the reinforcing agent, one dimension (1D) carbon/carbon (C/C) composites were prepared by a hot-pressing molding method at about 500℃ and subsequent carbonization as well as graphitization treatments. The influence of precursor pitches and heat-treatment temperatures (HTTs) on the thermal conductive properties of the C/C composites were investigated. The morphology and microstructure of graphitized C/C composites were characterized by scanning electron microscope and polarized-light microscope. The results show that both of the thermal diffusivities and the thermal conductivities of C/C composites along the longitudinal direction of fibers gradually increase with HTT. The C/C composite prepared by using AR pitch as a matrix precursor possesses obvious graphite-like layer structure, exhibiting the highest thermal conductivity. The room-temperature thermal conductivity and thermal diffusivity of the C/C composite treated at 3000℃ along the longitudinal direction of fibers are 734.4 W/(m·K) and 594.5 mm2/s, respectively.

Key words: 1D C/C composite with high thermal conductivity, thermal diffusivity, thermal conductivity

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