以国产KD-1型SiC纤维为增强体,采用化学气相沉积和酚醛树脂浸渍裂解获得两种碳源的多孔SiCf/C,通过气相渗硅工艺制备了KD-1 SiCf/SiC复合材料,对复合材料的微观结构和力学性能进行了研究.结果表明:不同碳源的多孔SiCf/C,经过气相渗硅得到SiCf/SiC复合材料的断裂韧性相差较大,分别为12.9,2.0MPa·m1/2.而对于酚醛树脂浸渍裂解制备的高孔隙率SiCf/C中间体,经过气相渗硅得到SiCf/SiC复合材料的密度及力学性能明显高于由低孔隙率SiCf/C得到的SiCf/SiC复合材料.
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