Effects of carbon matrix on microstructure and properties of 3-D C/ZrC composites prepared by reactive melt infiltration

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• 作者：Song Wang^a ; ^{wangs_0731@163.com" class="auth_mail} ; Yulin Zhu^a ; Hongmei Chen^a ; ^b ; Wei Li^a ; Zhaohui Chen^a
• 关键词：B. Composites ; C. Mechanical properties ; D. Carbides ; Reactive melt infiltration ; Ablation
• 刊名：Ceramics International
• 出版年：June, 2014
• 年：2014
• 卷：40
• 期：5
• 页码：7307-7314
• 全文大小：4051 K

文摘

Three-dimensional braided carbon fiber-reinforced ZrC matrix composites, 3-D C/ZrC, were fabricated by reactive melt infiltration process at 1200 掳C. Phenolic resin and asphalt were used as carbon precursors, and the effects of carbon matrix on microstructure and properties of the 3-D C/ZrC composites were investigated. The composites fabricated with asphalt showed a higher ZrC yield of 37.5卤1.0 vol% and better anti-ablative properties, with a mass loss rate of 0.8卤0.3 mg s^鈭? and a linear recession rate of 0.0006卤0.0002 mm s^鈭?. However, the use of phenolic resin could provide better mechanical properties of the obtained composites, including a flexural strength of 285.4卤9.7 MPa, an elastic modulus of 76.2卤4.0 GPa and a fracture toughness of 8.9卤0.8 MPa m^1/2. The main reason for the superior mechanical properties is the preservation of carbon fiber bundles in the phenolic resin based composites.