航天推进技术研究院主办
BAI Longteng,YANG Xiaohui,WANG Yi,et al.Research on thermal physical properties of C/SiC composite manufactured with low-cost process[J].Journal of Rocket Propulsion,2016,42(01):58-65.
低成本制造C/SiC复合材料的热物理性能研究
- Title:
- Research on thermal physical properties of C/SiC composite manufactured with low-cost process
- Keywords:
- low-cost manufacturing; C/SiC composite; thermal physical property; thermal expansion coefficient; thermal conductivity
- 分类号:
- V434-34
- 文献标志码:
- A
- 摘要:
- 采用先驱体浸渍裂解工艺制备了三维针刺C/SiC复合材料,系统地研究了其热物理性能.结果表明:该低成本制造工艺制备的C/SiC复合材料热膨胀系数随温度升高总体上呈增大趋势,但随着温度的升高,热膨胀系数增大程度逐渐减弱,并且z向的热膨胀系数要高于x-y方向,而CVD-SiC涂层的存在会降低其热膨胀性能;C/SiC复合材料比热容、导热率也随着温度的升高呈现逐渐增大的趋势,但增加速率逐渐减小.CVD-SiC涂层的存在会提高C/SiC复合材料的导热性能,有利于C/SiC复合材料产品与外界环境的热能交换,但会使材料的比热容降低.
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