Environmental Effects on Microstructural Stability of SiC/SiC Composites

Abstract： Environmental effects, especially O2 pressure, often make SiC/SiC composites degraded. In order to investigate the effects on microstructural stability, SiC/SiC composite specimens, made of Hi-NicalonTM SiC fibers, were annealed under a commercial grade Ar flow and an ultra-high purified Ar flow respectively. The microstructural evolution in SiC/SiC composites was examined by a field emission type high-resolution electron microscopy and a parallel electron energy loss spectroscopy. A possible mechanism for this degradation was discussed. 作 者： Tamaki Shibayama    Guo Wei He    Heishichiro Takahashi    Yutai Katoh    Akira Kohyama   作者單位： Tamaki Shibayama,Guo Wei He,Heishichiro Takahashi(Center for Advanced Research of Energy Technology, Hokkaido University, Sapporo 060-8628, Japan)

Yutai Katoh,Akira Kohyama(Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan) 

期 刊： 北京科技大學學報（英文版）  EISCI   Journal： JOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING  年，卷(期)： 1999, 6(2)  分類號： X-6  Keywords： ceramic matrix composite    SiC    oxidation    crystallization    interface   

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