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无机材料学报

无机材料学报

• 研究快报 • 上一篇    下一篇

乙醇热解制备炭/炭复合材料工艺探索及组织特征

张守阳, 颜夏峰, 李贺军, 李 伟, 郭领军   

  1. （西北工业大学 超高温复合材料实验室， 西安 710072）
  • 收稿日期:2009-03-11 修回日期:2009-05-11 出版日期:2009-09-20 网络出版日期:2009-09-20

Deposition of Pyrolytic Carbon using Ethanol as Precursor in Chemical Vapor Infiltration

ZHANG Shou-Yang, YAN Xia-Feng, LI He-Jun, LI Wei, GUO Ling-Jun   

  1. (Carboncarbon Composites Research Center, Key Laboratory of Ultrahigh Temperature Composites, Northwestern Polytechnical University, Xi’an 710072, China)
  • Received:2009-03-11 Revised:2009-05-11 Published:2009-09-20 Online:2009-09-20

PDF (PC)

1542

被引次数

6

摘要： 以密度0.47g/cm3的碳毡为预制体，乙醇为前驱体，氮气为载气，在1125℃，压力为20kPa的条件下，用等温压力梯度化学气相渗透法，经114h致密化，制备出密度为1.67g/cm3的炭/炭复合材料.经测试，材料的弯曲强度为137MPa.偏光显微分析显示：该材料各区域沉积的基体热解碳组织结构均为高织构，其消光角为19.5°～20.5°，石墨化处理后测得热解碳的d002为0.3362nm.断口扫描电子显微分析结果也进一步证实获得的热解碳组织为高织构.表明乙醇是一种极具潜力的制备炭/炭复合材料的前驱体.

关键词: 炭/炭复合材料, 乙醇, 化学气相渗透, 热解碳, 组织结构

Abstract: Using ethanol as the precursor of pyrolytic carbon, chemical vapor infiltration of a carbon fiber felt with an initial bulk density of 0.47g/cm3 was performed at the temperature of 1125°C and the pressure of 20kPa, resulting in a bulk density of 1.67g/cm3 after densification of 114h. Extinction angles from 19.5° to 20.5° for various regions in the densified sample are determined, which correspond to a high-textured carbon, leading to flexure strength of 137MPa. Analysis of 2D texture distribution suggests that ethanol is a promising carbon source to synthesize carbon-carbon composites with homogeneously high-textured pyrolytic carbon.

Key words: carbon-carbon composites, ethanol, chemical vapor infiltration, pyrolytic carbon, microstructure

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