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首页> 外文会议>56th International Astronautical Congress 2005 vol.6 >COMBUSTION GAS HEATING TESTS OF COMPOSITE MATERIALS
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COMBUSTION GAS HEATING TESTS OF COMPOSITE MATERIALS

机译：复合材料的燃烧气体加热测试

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It is considered that a carbon fiber reinforced carbon matrix (C/C) composite is the most appropriate material for a extendible nozzle because of its thermal and mechanical properties. In this study, C/C composite specimens coated with SiC by using different coating processes such as the conversion process, CVD (Chemical Vapor Deposition), CVR (Chemical Vapor Reaction) and two kinds of combinations of 'the conversion and CVD' and of 'CVR and CVD' were evaluated. The static and the cyclic heating tests by using the coupon shaped specimens were performed simulating booster engine nozzle environment. The cyclic heating tests resulted in larger weight loss than the static heating tests. Therefore the number of heating cycles is one of the important parameters for evaluation of the durability as well as total heating time. The specimens coated by using the CVD process resulted in the negligible weight loss, thus durability and availability of the CVD coating were demonstrated even under the oxidizer rich conditions.
机译：碳纤维增强碳基（C / C）复合材料因其热和机械性能而被认为是最适合可扩展喷嘴的材料。在这项研究中，通过使用不同的涂层工艺（例如转化工艺，CVD（化学气相沉积），CVR（化学气相反应）以及“转化和CVD”和评价了“ CVR和CVD”。通过使用样板形状的试样进行静态和循环加热测试，以模拟增压发动机喷嘴环境。循环加热测试比静态加热测试导致更大的重量损失。因此，加热循环次数是评估耐久性以及总加热时间的重要参数之一。通过使用CVD工艺涂覆的样品导致的重量损失可忽略不计，因此即使在富含氧化剂的条件下，也证明了CVD涂层的耐久性和可用性。

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