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利用前驱体浸渍、裂解方法制备了两种超高温陶瓷基复合材料,并对材料的力学性能进行了评价。采用SEM、EDS表征手段分析了材料复合过程中的微观结构特征,获得了工艺过程中碳纤维、基体、界面特征及其变化规律。结果表明,材料致密化周期减少,热处理时间缩短,对纤维的损伤减轻,能充分提高碳纤维的强度利用率,从而提高材料的力学性能。
Two kinds of ultra-high temperature ceramic matrix composites were prepared by impregnation and pyrolysis of precursors. The mechanical properties of the composites were also evaluated. The microstructure characteristics of the composites were analyzed by SEM and EDS, and the characteristics of carbon fiber, matrix and interface in the process were obtained. The results show that the densification cycle of the material is reduced, the heat treatment time is shortened, the damage to the fiber is reduced, the strength utilization ratio of the carbon fiber can be fully increased, and the mechanical property of the material can be improved.