尹立,赵东林,刘辉,迟伟东,沈曾民

• 1:北京化工大学化工资源有效利用国家重点实验室

摘要(Abstract)：

以T700碳纤维三维针刺整体毡为预制体,利用高压液相浸渍-碳化周期循环致密工艺制备三维针刺中间相沥青基C/C复合材料。用XRD、SEM及力学性能测试研究了三维针刺C/C复合材料的微观结构与弯曲断裂机制。结果表明:随着浸渍-碳化次数的增加,三维针刺C/C复合材料的密度、抗弯强度和杨氏模量逐渐增大,石墨化处理使三维针刺C/C复合材料的石墨层间距减小,石墨化度提高。经2800℃石墨化处理后,三维针刺C/C复合材料中纤维与基体间界面结合减弱,复合材料的抗弯强度减小并表现出韧性断裂特征。

关键词(KeyWords)： C/C复合材料;中间相沥青;石墨化;微观结构;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50672004);; 国家高技术研究发展计划(“863”计划)资助项目(2008AA03Z513)

作者(Author): 尹立,赵东林,刘辉,迟伟东,沈曾民

DOI: 10.13289/j.issn.1009-6264.2011.02.003

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