以可再生的资源无水乙醇为前驱体,在负压条件下,沉积温度为900℃~1200℃,采用压力梯度CVI工艺制备C/C复合材料.考察了沉积时间与密度的变化规律,采用偏光显微镜和扫描电镜观察了材料的组织结构和断口形貌,利用三点弯曲测定了材料的弯曲强度.结果表明:采用乙醇为前驱体,可大幅度提高致密化效率,96h制备出密度为1.47g/cm3的C/C复合材料;易于获得高织构的组织,制备试样的热解炭组织以粗糙层为主,断裂方式为假塑性断裂.乙醇是一种很有应用前景的制备C/C复合材料的前驱体.
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