【摘 要】
：
The 3-D needled C/C preforms with different fiber volume fraction, by chemical vapor infiltration (CVI) densified to obtain a density of 1.0 ~ 1.1g / cm3, w
【机 构】
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College of Aerospace and Materials Engineering,National University of Defense Technology,Changsha 41
【出 处】
：
第二届中国国际复合材料科技大会 (CCCM-2)
论文部分内容阅读
The 3-D needled C/C preforms with different fiber volume fraction, by chemical vapor infiltration (CVI) densified to obtain a density of 1.0 ~ 1.1g / cm3, were used to fabricate C/C-SiC composites by gaseous silicon infiltration (GSI).The research studied the effects of fiber volume fraction onthe phases and mechanical properties of C/C-SiC composites fabricated by GSI, and analyzed of reaction mechanism of Si and C.The results show that, although the SiC contentdecreaseas the fiber volume fraction increases,the residual Si content, porosity and the mechanical properties increases.
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