用STM研究渗硼改性碳纤维结构与力学性能的相关性

复合材料学报, 2004, 21(1): 7-11. doi: 10.3321/j.issn:1000-3851.2004.01.002

用STM研究渗硼改性碳纤维结构与力学性能的相关性

沈曾民 ^1, , 田艳红 ^2, , 常维璞 ^3, , J B Doneet ^4, , T K Wang ^5,

1.北京化工大学,碳纤维及复合材料研究所,北京,100029

2.北京化工大学,碳纤维及复合材料研究所,北京,100029

3.北京化工大学,碳纤维及复合材料研究所,北京,100029

4.Ecole Nationale Superieure de Mulhouse,3 rue A.Werner,68093 Mulhouse,Cedex,France

5.Ecole Nationale Superieure de Mulhouse,3 rue A.Werner,68093 Mulhouse,Cedex,France

关键词：碳(石墨)纤维 , 渗硼 , 表面微观结构 , STM , XRD

STUDY ON THE RELATION BETWEEN THE MICROSTRUCTURE AND PROPERTIES OF BORON MODIFITD CF BY STM

研究了PAN基碳纤维浸渍不同硼化物溶液进行高温热处理后(2500℃)对力学性能的影响.采用扫描隧道显微镜观察了渗硼处理对碳纤维表面微观形态结构的影响,同时还采用X-ray衍射技术分析了渗硼处理对纤维结构参数的影响.结果表明渗硼处理可提高CF的力学性能,采用硼化物A浸渍热处理后CF的模量和强度分别提高了10.3 %和15.3 %.通过STM观察可以很清楚看到渗硼处理可提高CF的择优取向和晶体尺寸,减少表面缺陷.X-ray衍射分析结果与STM一致,渗硼热处理提高了CF的晶体尺寸.

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