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热处理对含C-SiC-TaC-C界面C/C复合材料力学性能的影响
  • ISSN号：1000-3851
  • 期刊名称：复合材料学报
  • 时间：2012.2.2
  • 页码：98-103
  • 分类：TB332[一般工业技术—材料科学与工程]
  • 作者机构：[1]中南大学粉末冶金国家重点实验室,长沙410083
  • 相关基金：国家重点基础研究项目（2011CB605805）;国家自然科学基金创新群体研究项目（51021063）;湖南省自然科学基金联合基金项目（10JJ6083）;教授部博士点新教师基金项目（20100162120002）
  • 相关项目：特种粉末冶金材料应用基础研究
作者： 李斌|陈招科|熊翔|
关键词： C/C复合材料, C-SiC-TaC-C界面, 热处理, 界面微观结构, 力学性能, C/C composites, C-SiC-TaC-C multi-interlayer, high temperature treatment, microstructure ofinterlayers, mechanical properties
中文摘要：

以准三维针刺炭纤维毡为预制体，采用化学气相渗透工艺在预制体中炭纤维／基体炭之间制备C-SiC-TaC-c复合界面，利用树脂浸渍一炭化工艺对材料进一步增密，获得含C-SiC-TaC-C界面的C／C复合材料。研究了1400-2500℃不同温度热处理前后复合材料的微观结构和力学性能。结果表明：热处理前，SiC-TaC界面为管状结构，复合材料的抗弯强度为241．6MPa，以脆性断裂为主；经1400-1800℃热处理后，TaC界面破坏呈颗粒状，复合材料的平均抗弯强度下降到238．9-226．1MPa，其断裂方式不变，但断裂位移由0．7mm增至1．0mm；经2000-2500℃热处理后，SiC、TaC界面均受到破坏，复合材料平均抗弯强度急剧下降至158．7-131．8MPa，断裂方式由脆性断裂转变为假塑性断裂。

英文摘要：

C-SiC-TaC-C multi-interlayers were introduced in the carbon fiber/carbon matrix interface in quasi 3D needled carbon felt by chemical vapor infiltration, the modified C/C porous performs were densified by impregnation- carbonization processes to obtain C/C composites with C-SiC-TaC-C multi- interlayers. The microstructure and mechanical properties were studied after heat treatment （HTT） at different temperatures of 1400-2500℃. The results show that the SiC- TaC interlayers have a tubular structure before HTT; while the average flexural strength of the as-prepared composites is 241.6 MPa with a brittle fracture. After HTT at 1400-1800℃, TaC interlayer is damaged to granular structure; As a result, the flexural strength of the composites declines to 238.9-226.1 MPa also with a brittle fracture, but an increasing of fracture displacement from 0.7 mm to 1.0 mm. After HTT at 2000-2500℃, both SiC and TaC interlayer are damaged. The flexural strength sharply declines to 158.7-131.8 MPa with an obvious change of fracture behavior from brittleness to pseudo-ductility.

同期刊论文项目
特种粉末冶金材料应用基础研究
期刊论文 181 会议论文 3 专利 16
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期刊信息
  • 《复合材料学报》
  • 中国科技核心期刊
  • 主管单位:工业和信息化部
  • 主办单位:北京航空航天大学 中国复合材料学会
  • 主编：益小苏
  • 地址：北京海淀区学院路37号
  • 邮编：100083
  • 邮箱：
  • 电话：010-82316907
  • 国际标准刊号：ISSN：1000-3851
  • 国内统一刊号：ISSN：11-1801/TB
  • 邮发代号:80-413
  • 获奖情况:
  • 国内外数据库收录:
  • 被引量:17731