采用22Hf78Si合金反应熔渗法制备了高性能低成本的C/C-SiC-HfC复合材料.首先采用化学气相渗透法增密碳纤维预制体得到多孔C/C复合材料预制体,然后在1700℃下反应熔渗22 Hf78Si合金制备得到C/C-SiC-HfC复合材料.XRD分析表明复合材料由碳、SiC和HfC相组成.C/C-SiC-HfC复合材料的抗弯强度为237MPa,断裂模式为假塑性断裂模式.采用激光测试了反应熔渗C/C-SiC-HfC复合材料的抗烧蚀性能,复合材料的线烧蚀率为0.038mm/s,大大低于C/SiC复合材料的线烧蚀率0.081mm/s.烧蚀后复合材料烧蚀表面形成了一层HfO2烧蚀层,有效提高了复合材料的抗烧蚀性能.
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