1800℃烧成含铁SiC纤维的微观结构分析  

Microstructure of iron-containing SiC fibers sintered at 1800℃

作　　者：唐学原[1] 丁马太[1] 陈立富[1] 

机构地区：[1]厦门大学材料学院特种先进材料实验室,福建厦门361005

出　　处：《功能材料》2013年第9期1281-1284,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51072169);福建省自然科学基金资助项目(2010J01307)

摘　　要：以羰基铁为铁源,制备了含铁SiC纤维,并经1800℃×5min烧成。分别以扫描电子显微镜(SEM)、透射电子显微镜(TEM)及其能谱仪(EDS)表征了烧成纤维的微观结构和微区成分。结果表明,烧成纤维由致密的晶粒区及较为疏松的晶间区两部分组成。前者的主要成分是SiC和Fe;后者则包括游离碳及SiCxOy。烧成纤维的微观组织仍然致密,表明其所含的少量铁具有明显促进SiC纤维高温致密化的作用。Iron containing SiC fibers were prepared using iron pentacarbonyl [-Fe （CO）s ] as the iron source, then sintered at 1800℃. The microstructure and the element of the sintered fibers were characterized by TEM EDS. Results show that the sintered fibers consist of crystalline regions （compact regions） and amorphous regions （loose regions）. The crystalline regions are composed of SiC and Fe, while the amorphous regions are made up of free C and SiCx Oy. phase. After sintered at high temperature of 1800℃, densification of the SiC fibers was promoted for the presence of Fe.

关 键 词：含铁SiC纤维 微观结构 烧成 

分 类 号：TQ342[化学工程—化纤工业]