Effect of heat treatment on the mechanical properties of PIP-SiC/SiC composites fabricated with a consolidation process

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• 作者：Shuang Zhao ; Xingui Zhou ; Jinshan Yu
• 关键词：B. Composites ; C. Mechanical properties ; D. SiC ; Heat treatment ; Polymer impregnation and pyrolysis
• 刊名：Ceramics International
• 出版年：April, 2014
• 年：2014
• 卷：40
• 期：3
• 页码：3879-3885
• 全文大小：1903 K

文摘

Continuous SiC fiber reinforced SiC matrix composites (SiC/SiC) have been considered as candidates for heat resistant and nuclear materials. Three-dimensional (3D) SiC/SiC composites were fabricated by the polymer impregnation and pyrolysis (PIP) method with a consolidation process, mechanical properties of the composites were found to be significantly improved by the consolidation process. The SiC/SiC composites were then heat treated at 1400 掳C, 1600 掳C and 1800 掳C in an inert atmosphere for 1 h, respectively. The effect of heat treatment temperature on the mechanical properties of the composites was investigated, the mechanical properties of the SiC/SiC composites were improved after heat treatment at 1400 掳C, and conversely decreased with increased heat treatment temperature. Furthermore, the effect of heat treatment duration on the properties of the SiC/SiC composites was studied, the composites exhibited excellent thermal stability after heat treatment at 1400 掳C within 3 h.