热解碳涂层碳纤维增强碳化硅复合材料热压工艺研究

A Study on the Hot Press of Pyrolysised Carbon Coated Carbon Fiber Reinforced Silicon Carbide Composite

采用经过热解碳涂层的 M40 JB碳纤维 ,以有机硅先驱体聚碳硅烷为粘结剂 ,热压烧结制备了 Cf/Si C复合材料 ,测试了复合材料的性能并进行了对比 ,同时运用 SEM,TEM等分析手段对复合材料的微观结构进行了表征。结果表明 :所采用的碳纤维热解碳涂层对复合材料的性能有较大的影响 ,较好的热压温度为 1 850℃ ,压力为 2

WT5BZ]The continuous carbon fiber reinforced silicon carbide ceramic matrix composites were fabricated through hot press methods, using pyrolysised carbon coated carbon fiber M40JB as reinforcement and polycarbosilane as precursor The properties of C f/SiC composite were tested and compared The microscopy structure was characteristic by SEM and TEM at the same time The results show that the pyrolysised carbon coating have evident effect on the properties of C f/SiC composite, the hot press temperature 1850℃ and pressure 25MPa is suitable