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首页> 外文会议>High temperature ceramic matrix compositei III >The Pretreatment on Carbon Fibers for C/SiC Composites
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The Pretreatment on Carbon Fibers for C/SiC Composites

机译：C / SiC复合材料的碳纤维预处理

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摘要

A combine pretreatment on the carbon fibers, coating the fibers with pyrolytic carbon by CVD process and then heat treating at 1500 ℃ in N2, has been investigated. The results show that the tensile strength of the fibers coated and heat treated increased to 50% ～ 80.7% of the initial strength contrasting to that of the fibers heat treated only, whose strength decreased to 37% of the initial strength. The influence of coating thickness on the residual fiber strength has also been investigated. The flexural strength and fracture toughness of the composites reinforced by the coated and heat treated carbon fibers improved. SEM microstructure analysis indicated that an increase in the strength of carbon fibers and reinforced composite is due to the healing of natural defects and cracks on the surface of the carbon fibers and protecting the fibers from being eroded by impurities at high temperature.
机译：研究了对碳纤维进行联合预处理，通过CVD工艺在纤维上涂上热解碳，然后在N2中于1500℃进行热处理的方法。结果表明，经涂覆和热处理的纤维的拉伸强度提高到初始强度的50％〜80.7％，而仅经过热处理的纤维的拉伸强度下降到初始强度的37％。还研究了涂层厚度对残余纤维强度的影响。涂覆和热处理的碳纤维增强的复合材料的弯曲强度和断裂韧性得到改善。 SEM显微结构分析表明，碳纤维和增强复合材料强度的提高是由于碳纤维表面自然缺陷和裂纹的愈合以及保护纤维免受高温下的杂质侵蚀所致。

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  • 来源
  • 会议地点 Osaka(JP);Osaka(JP);Osaka(JP);Osaka(JP)
  • 作者

    L. Yan; M. Song; T. Wan; W. Zou;

  • 作者单位

    Shaanxi Non-Metallic Material and Technology Institute, Post Box 101#, Xi'an, 710025, China;

    Shaanxi Non-Metallic Material and Technology Institute, Post Box 101#, Xi'an, 710025, China;

    Shaanxi Non-Metallic Material and Technology Institute, Post Box 101#, Xi'an, 710025, China;

    Shaanxi Non-Metallic Material and Technology Institute, Post Box 101#, Xi'an, 710025, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 TQ174.58;
  • 关键词

    carbon fiber; coating; heat treatment; C/SiC composites;

    机译：碳纤维;涂层;热处理; C / SiC复合材料;

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