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  • 陈平 ( 教授 )

    的个人主页 http://faculty.dlut.edu.cn/pingchen/zh_CN/index.htm

  •   教授   博士生导师   硕士生导师
  • 任职 : 辽宁省先进聚合物基复合材料重点实验室主任。
论文成果 当前位置: 中文主页 >> 科学研究 >> 论文成果
Effects of vacuum thermal cycling on mechanical and physical properties of high performance carbon/bismaleimide composite

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论文类型:期刊论文
发表时间:2011-11-01
发表刊物:MATERIALS CHEMISTRY AND PHYSICS
收录刊物:Scopus、SCIE、EI
卷号:130
期号:3
页面范围:1046-1053
ISSN号:0254-0584
关键字:Composite materials; Mechanical properties; Thermogravimetric analysis (TGA); Atomic force microscopy (AFM)
摘要:The aim of this article was to investigate the effects of vacuum thermal cycling on mechanical and physical properties of high performance carbon/bismaleimide (BMI) composites used in aerospace. The changes in dynamic mechanical properties and thermal stability were characterized by dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA), respectively. The changes in linear coefficient of thermal expansion (CTE) were measured in directions perpendicular and parallel to the fiber direction, respectively. The outgassing behavior of the composites were examined. The evolution of surface morphology and surface roughness were observed by atomic force microscopy (AFM). Changes in mechanical properties including transverse tensile strength, flexural strength and interlaminar shear strength (ILSS) were measured. The results indicated that the vacuum thermal cycling could improve the crosslinking degree and the thermal stability of resin matrix to a certain extent, and induce matrix outgassing and thermal stress, thereby leading to the mass loss and the interfacial debonding of the composite. The degradation in transverse tensile strength was caused by joint effects of the matrix outgassing and the interfacial debonding, while the changes in flexural strength and ILSS were affected by a competing effect between the crosslinking degree of resin matrix and the fiber-matrix debonding. (C) 2011 Elsevier B.V. All rights reserved.

 

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