摘要: |
综述了碳/二氧化硅复合材料的最新研究进展。首先简要论述了连续碳纤维和短切碳纤维增强二氧化硅基复合材料的制备方法及性能,其次重点介绍了制备过程中二氧化硅析晶的控制及添加剂的选择,复合材料优异的高低温力学性能和在航天器上的应用特性,如防热烧蚀、吸波。最后在分析基体内部碳纤维氧化机理的基础上,提出解决碳纤维氧化和二氧化硅高温软化问题,发展3D碳/二氧化硅复合材料是进一步研究的方向。 |
关键词: 碳/二氧化硅;析晶;碳纤维氧化;防热烧蚀 |
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A Review of Hot-pressed Cf/SiO2 Composite |
Xie Dong Yang Jie Zhou Shaojian Lian Yunqing
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Xi’an Aerospace composite research institute, Xi’an 710025
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Abstract: |
Thia paper reviews the latest research progress of carbon fiber reinforced silica composites. It summarizes the preparation method and property of continuous fiber and chopped fibers individually. It reveals the characters of Cf/SiO2: the brittle to plastic transition temperature, crystallization influencing factor, addition multiple roles, oxidation of carbon fiber and evaluation of wear resistance and microwave absorption. The new trends are solving problem of carbon fibers’ oxidation or silica softening at high temperature, and developing 3D Cf/SiO2 . |
Key words: carbon fiber reinforced silica;crystallization;oxidation of carbon fiber;wear resistance |