摘要
将Si-B-N-C陶瓷纤维在静置的空气氛围下分别于1300~1400℃区间内处理不同时间,通过扫描电镜(SEM)观察其微观结构的变化,用X-射线能量色散仪(EDS)、元素分析(EA)表征其截面及内部的元素分布和含量变化,并借助X-射线衍射光谱(XRD)表征氧化处理对纤维晶型变化的影响。结果表明:氧化后的纤维有明显的皮芯结构,并且皮层大致可分为3层,主要由B、N、Si、O元素组成;氧化保护层的存在,很好地阻隔了纤维核心层与外界空气的直接接触,从而保留了纤维本身优异的耐高温性能。
The Si-B-N-C ceramic fiber is treated in an insert air atmosphere with different time/temperature ranging from 1 300℃to 1 400℃.The microstructure is observed by SEM,and its element distribution is studied by EDS and EA.Meanwhile,crystallization is characterized through XRD analysis.The result showes obvious double-layer structure,which can be divided into 3 parts,mainly composed by B/N/Si/ 0.As the existence of protective layer,the fibers remain good high temperature performance by prevented from oxidation.
出处
《合成纤维》
CAS
2012年第8期14-17,26,共5页
Synthetic Fiber in China
基金
国家自然科学基金项目(编号20704005和90916025)
关键词
Si-B-N-C陶瓷纤维
高温抗氧化性
晶型结构
Si-B-N-C ceramic fiber
high temperature oxidation resistance
microcrystalline structure