Influence of pyrocarbon amount in C/C preform on the microstructure and properties of C/ZrC composites prepared via reactive melt infiltration

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• 作者：Si&rsquo ; an Chen ; Changrui Zhang ; Yudi Zhang ; Haifeng Hu ; ^{hfhu_nudt@nudt.edu.cn" class="auth_mail}
• 关键词：Ceramic matrix composites ; Reactive melt infiltration ; Microstructure ; Mechanical property ; Ablation property
• 刊名：Materials and Design
• 出版年：June, 2014
• 年：2014
• 卷：58
• 期：Complete
• 页码：570-576
• 全文大小：2188 K

文摘

C/ZrC composites were prepared via reactive melt infiltration with zirconium from porous C/C preforms with various pyrocarbon contents. As the pyrocarbon amount in C/C preform increased from 34.1 vol.% to 61.7 vol.%, the densification of C/ZrC composites was hindered and the ZrC content in C/ZrC composites decreased gradually from 35.3 vol.% to 6.3 vol.%. Meanwhile, the flexural strength of C/ZrC composites decreased initially and then increased, but the flexural modulus rose continuously. The flexural strength and modulus of the composites fabricated from the preform with 34.1 vol.% pyrocarbon matrix were 181 卤 4 MPa and 13.0 卤 1.2 GPa, respectively, and the mass loss rate and linear recession rate were 0.0031 g/s and 0.0012 mm/s, respectively.