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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

2D C/C复合材料微观结构与力学性能的研究

和永岗, 李克智, 魏建锋, 郭领军, 张磊磊
   

  1. （西北工业大学 炭/炭复合材料研究中心, 西安 710072）
  • 收稿日期:2009-05-07 修回日期:2009-06-22 出版日期:2010-02-20 网络出版日期:2010-02-20

Study on the Microstructures and Mechanical Properties of 2D C/C Composites

HE Yong-Gang, LI Ke-Zhi, WEI Jian-Feng, GUO Ling-Jun, ZHANG Lei-Lei   

  1. (Carbon/Carbon Composites Technology Research Center, Northwestern Polytechnical University, Xi’an 710072, China)
  • Received:2009-05-07 Revised:2009-06-22 Published:2010-02-20 Online:2010-02-20

PDF (PC)

1533

被引次数

36 | 9

摘要：

采用等温化学气相渗透方法, 通过调整沉积工艺, 制备了具有不同微观组织结构的2D C/C复合材料. 利用偏光显微镜（PLM）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）结合选区电子衍射（SAED）, 研究了热解炭基体微观组织结构, 借助万能试验机测试了材料的三点弯曲性能. 结果表明：层状高织构（HT）热解炭基体占优时C/C复合材料表现为假塑性断裂; 扁平片状中织构（MT）热解炭与颗粒状各向同性层热解炭（ISO）有利于提高材料的弯曲强度; HT基体与炭纤维界面结合良好, 界面处不存在非HT织构, 但取向角(OA)略有增大.

关键词: C/C复合材料, 组织结构, 弯曲强度, 取向角

Abstract:

The 2D C/C composites with different microstructures were fabricated by isothermal-isobaric chemical vapor infiltration (ICVI). The mechanical properties of the 2D C/C composites were investigated by 3-point bending tests. The microstructures of the pyrocarbon matrix were observed by polarized light microscope (PLM), scanning electron microscope (SEM), transmission electron microscope (TEM) combining selected area electron diffraction (SAED). The results show that 2D C/C composites with dominant layered-HT pyrocarbon matrix exhibit a pseudo-plastic failure behavior. The flake-like fragments MT and granular-like particles ISO are in favor of increasing the flexural strength of the materials. It exists a good interfacial bonding between the fiber and HT layer. The non-HT layer does not exist at the interface, but the orientation angle (OA) of the matrix slightly increases.

Key words: C/C composites, textures, flexural strength, orientation angle

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