用电化学表面处理方法制备高强度SiC纤维  

PREPARATION OF THE HIGH-TENSILE-STRENGTH SiC FIBER BY ELECTROCHEMICAL SURFACE TREATMENT

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

机构地区：[1]中国科学院金属研究所

出　　处：《材料研究学报》2000年第6期670-672,共3页Chinese Journal of Materials Research

基　　金：八六三计划新材料领域!863-715-011-0130资助项目.

摘　　要：采用电化学方法表面处理用ＣＶＤ法制备的高强度ＳｉＣ纤维，研究了ＳｉＣ纤维的阳极极化 曲线，提出了新的阳极反应机制，吸附在阳极表面的ＯＨ－离子通过前置反应生成中间产物Ｏ－，这个中 间产物破坏Ｃ原子与Ｓｉ之间的化学键，形成Ｓｉ－Ｏ键后再相互连接构成表面膜．如果反应时间过长，则 一些表面的Ｓｉ原子与基体上的碳原子Ｃｂ之间的化学键会被破坏。The high-tensile-strength SiC fiber was prepared by electrochemical surface treatment. The M352 Corrosion Software system was used to analyze the anodic polarization curve of the SiC fiber. The new mechanism of the anodic reaction was put forth. The absorptive OH- ions on the surface are turned to the intermediates O - by the former reaction approaches, which could break the chemical bonds between C and Si atoms. The Si-O bonds form and link to each other to build a surface film. If the reaction lasts too long, some of the Si-Cb bonds that link the surface Si atoms to the Cb atoms of the substrate would be damaged, and the surface film would break off due to its expanding.

关 键 词：SiO纤维 电化学表面处理 反应机制 阳极氧化曲线 

分 类 号：O646.5[理学—物理化学] O613.7[理学—化学]