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C/SiC复合材料在超高温燃烧室环境下的烧蚀行为
作者:成溯 段刘阳 耿莉 王一光 
单位:西北工业大学 西安 710072 
关键词:发动机燃烧风洞 超高温燃烧室环境 碳纤维/氧化硅复合材料 烧蚀失效 
分类号:TB332
出版年,卷(期):页码:2018,46(12):0-0
DOI:10.14062/j.issn.0454-5648.2018.12.04
摘要:

 针对化学气相渗透法制备的C/SiC复合材料燃烧室,采用发动机燃烧风洞,研究了其在超高温燃气环境下的氧化烧蚀行为,分析了C/SiC复合材料燃烧室内各个区域的烧蚀形貌特征。结果表明:SiC在不同区域表现出不同的烧蚀行为,包括主被动氧化、层流冲刷、湍流冲刷等,这些烧蚀及其耦合作用使得SiC基体被侵蚀以及碳纤维被氧化,最终导致C/SiC复合材料在燃烧时失效。C/SiC复合材料是一种重要的超高温热防护材料,了解在服役环境下这种材料的失效机理是其应用和优化的基础。

 The ablation behaviors of the carbon/silicon carbide composite chamber prepared by chemical vapor infiltration were investigated by testing in a kerosene/oxygen combustion environment. Ablation morphologies and mechanisms of each region were analyzed and discussed. The result showed that the active and passive oxidation of SiC, flushing action by laminar flow and turbulence flow played different roles in different regions, respectively. The combination of two or more factors above resulted in consumption of SiC and carbon fibers, and finally led to the failure of the chamber.

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参考文献:

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