| 引用本文: | 何新波,张长瑞,周新贵,等.烧结温度对 Cf/SiC 复合材料界面的影响.[J].国防科技大学学报,2000,22(4):34-37.[点击复制] |
| HE Xinbo,ZHANG Changrui,ZHOU Xingui,et al.Effect of Sintering Temperatures on Interfaces of Cf/SiC Composites[J].Journal of National University of Defense Technology,2000,22(4):34-37[点击复制] |
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| 烧结温度对 Cf/SiC 复合材料界面的影响 |
| 何新波1, 张长瑞2, 周新贵2, 张新明1, 周安郴2 |
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(1.中南工业大学 材料科学与工程系, 湖南 长沙 410083;2.国防科技大学 航天与材料工程学院, 湖南 长沙 410073)
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| 摘要: |
| 系统地研究了烧结温度对Cf/ SiC 复合材料界面和力学性能的影响。结果表明, 烧结温度较低(1700℃)时, 由于复合材料的烧结性差, 纤维与基体间仅仅为一种机械结合, 因此纤维与基体间结合很弱, 从而导致复合材料力学性能低。烧结温度提高至1800℃后, 由于适量的富碳界面相不仅可避免纤维与基体间的直接结合, 而且使纤维与基体间的结合强度适中, 因而复合材料具有很好的力学性能。进一步提高烧结温度至1850℃或更高温度时, 由于界面相与纤维间的反应加重, 纤维本身性能大大降低。同时, 纤维与基体间结合强度提高, 因此复合材料的力学性能大大降低。 |
| 关键词: Cf/SiC 复合材料 烧结温度 界面 力学性能 |
| DOI： |
| 投稿日期：1999-09-17 |
| 基金项目:国防预研重点项目资助(12.1.4.3) |
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| Effect of Sintering Temperatures on Interfaces of Cf/SiC Composites |
| HE Xinbo1, ZHANG Changrui2, ZHOU Xingui2, ZHANG Xinming1, ZHOU Anchen2 |
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(1.Department of Materials Science and Engineering, CSUT, Changsha 410083, China;2.College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| The effect of sintering temperatures on the interfaces and mechanical properties of the Cf/SiC composites was investigated. Owing to the poor sinterability as a result of low sintering temperature (l700℃), a very weakly bonded fiber/matrix interface was formed , which gave the composite poor mechanical property. On increasing sintering temperature to l800℃, a carbon-rich interface not only avoided the direct contact of the fibers with the matrix, but also made the fiber/matrix bonding desirable, so the composite achieved excellent mechanical properties. However, the composite sintered at l850℃ or higher temperature showed substantially degraded mechanical properties, which was mainly attributed to the improvement in the fiber/matrix interfacial bonding and deterioration in the properties of the fibers caused by the serious reaction between the fibers and the interphase. |
| Keywords: Cf/SiC composites sintering temperature interfaces mechanical properties |
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