复合材料
聚酰亚胺
材料科学
抗弯强度
摩擦学
X射线光电子能谱
纤维
扫描电子显微镜
碳纤维
复合数
图层(电子)
化学工程
工程类
作者
Xinrui Zhang,Xianqiang Pei,Bo Mu,Qihua Wang
摘要
Abstract Pitch‐based short carbon fibers (CFs) were treated by air oxidation and cryogenic nitrogen, respectively. Thereafter the treated and untreated CFs were incorporated into polyimide (PI) matrix to form composites. The CFs before and after treatment were examined by XPS and SEM.The flexural strength of the specimen was determined in a three‐point test machine and the tribological properties of PI composites sliding against GCr15 steel rings were evaluated on an M‐2000 model ring‐on‐block test rig. The results show that the surface of the treated CFs became rougher. Lots of active groups formed on the CF surface after air oxidation.The treatment can effectively improve the mechanical and tribological properties in their PI composites due to the enhanced fiber‐matrix interfacial bonding. Copyright © 2008 John Wiley & Sons, Ltd.
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