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通过PIP结合CVI法制备了C纤维增韧三维氧化铝-莫来石陶瓷基复合材料,采缮用CVD法制备了防氧化涂层,研究了复合材料致密化过程、复合材料的物相、微观结构、力学性能和抗氧化性能.结果表明,CVI能够将氧化硅引入到多孔氧化铝基体内部,1400℃处理后氧化硅与氧化铝完全反应生成莫来石,显著提高了仅以PIP法制备的多孔氧化铝基复合材料的力学性能.CVD制备的氧化硅涂层有效阻止了氧气的侵入,复合材料在1200℃大气环境下保温50h后,试样三点弯曲强度保持率为70%.

参考文献

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