Development study of gas seal functioned high temperature ceramic composites

本研究对高温陶瓷基复合材料的发展进行了研究，该陶瓷基复合材料可以在2000K以上的温度范围内使用，而碳化硅基复合材料无法存活。采用浸硅平面编织碳纤维布层压板，制备了不同组成的碳纤维增强锆基三相陶瓷基复合材料。通过H_2/O_2气体燃烧器台架试验考察了材料的抗氧化性。对复合材料的力学性能和抗氧化性能进行了测试，发现三相陶瓷基复合材料的抗氧化性能优于碳化硅基复合材料。某小型推进器碳纤维预制件采用三轴编织工艺加工成功。复合推进器不能进行射击试验以显示其性能。然而，为板状复合板建立的复合工艺可以适应推进器形状。最后，所有具有技术挑战性的问题都得到了解决。

In this study, development study on high temperature ceramic based composite which can use in the temperature range over 2000K where SiC based composite could not survive. Carbon fiber reinforced three phase Zr based ceramics (ZrB2, ZrC and SiC) matrix composite with various composition was processed by plane woven carbon fiber cloth laminates through Si impregnation technique. Oxidation resistance was examined by H2/O2 gas burner rig test. Mechanical properties and Oxidation resistance of the composite was examined and the three phase ceramics matrix composite exhibited superior oxidation resistance than SiC matrix composite. Carbon fiber preform for a sub sized thruster successfully processed by three axes braiding technique. Composite thruster could not made for firing test to show its performance. However, the composite process established for a plate shaped composite panel could be adapted to the thruster shape. Finally all technical challenging issues had been cleared.