电化学表面处理对SiC纤维的强化作用  

REINFORCEMENT MECHANISM OF CVD SiC FIBER BY SiO2 SURFACE FILM

作　　者：罗鲲[1] 石南林[1] 祖亚培[1] 段亚丁[1] 文钟晟[1] 

机构地区：[1]中国科学院金属研究所

出　　处：《材料研究学报》2001年第1期105-109,共5页Chinese Journal of Materials Research

基　　金：八六三计划新材料领域资助项目!863-715-011-0130

摘　　要：采用ＳＥＭ分析了用电化学表面处理方法得到的高强度ＳｉＣ纤维表面形貌和断口的结构　讨 论了表面氧化股的形成对用 ＣＶＤ法制备的Morphology of the surface and fracture of the high-tensile-strength SiC fiber after electrochemical treatment was analyzed in this paper. During the process of anodic oxidation, SiO2 particles formed in some active regions on the Sic fiber surface at first, then connected together becoming a compact surface layer. Formation of the SiO2 layer smoothened the surface morphology, and lessened the number of surface defects, and also alleviated the locally concentrating of tension. On the other hand, the surface took on compression instead of the inherent slight tension after electrochemical treatment by the differential on Mole volume between SiO2 and SiC, and the occurring and enlarging of the micro-cracks on the surface were seriously restrained. According to the comparison between the measuring values and the calculating results, it is greatly possible that compression is the main reason for the reinforcement of SiC fibers.

关 键 词：表面氧化膜 强化作用 电化学表面处理 力学性能 碳化硅纤维 

分 类 号：TQ343.6[化学工程—化纤工业]