Abstract
The polymer derived SiC fibers with high mechanical properties are mainly used as reinforcing materials for ceramic matrix composites (CMCs), which are applied in various fields. However, there is a problem that amorphous SiC fibers are decomposed by oxygen impurities and excess carbon at high temperature. In this study, SiC fibers prepared under various atmospheric-pressure near the decomposition temperature exhibited morphological gradient with various mechanical and electrical properties. In particular, the mechanical properties and electrical properties of polymer-derived SiC fibers showed an inverse correlation depending on the surface layer such as carbon-rich or amorphous SiCxOy.
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