Influence of Composition and Microstructure on the Mechanical Properties of SiC Ceramic Fibers

Abstract:

In this work, the influences of composition and microstructure on the mechanical properties and thermal stability of SiC ceramic fibers were investigated. XPS, XRD, SEM, and element analysis were used to analyze the elemental composition and structural morphology. The contents of oxygen and free carbon influence the crystallinity of SiC fibers, which inhibit the grain growth of β-SiC. The reduction of tensile strength of the fibers sintered under temperatures above 1700°C is attributed to the appearance of massive defects on the outer surface of the fibers, which can be overcome by the change of sintering conditions of the pyrolysis fibers.

• Periodical: Materials Science Forum (Volume 816)
• Pages: 163-168
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.816.163
• Online since: April 2015
• Authors: Yan Zi Gou*, Hao Wang, Ke Jian, Yong Cai Song, Jun Wang
• Keywords: Ceramic, Composite, Polycarbosilane, Precursor, SiC Fiber

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