摘要
采用前驱体转化法制备Cf/ZrB2-SiC复合材料,对材料的热物理和热震性能进行了研究。采用扫描电镜和X射线衍射分析材料的微观结构及物相变化。结果表明:复合材料在1 700℃热震循环10次材料保持完整,表现出了良好的抗热震性能。通过微观结构分析,高温氧化后生成的多孔SiO2氧化层能够吸收热应力,缓解因热震带来的巨大温度差,ZrB2组元的加入有效地提高了材料抗热震性。
Cf/ZrB2-SiC composites were prepared using precursor in filtration and pyrolysis (PIP) technology.The thermal conductivity,coefficient of thermal expansion (CTE) and thermal shock resistance were investigated.SEM and XRD were used to analysis microstructure and phase.The result show that the composites exhibits excellent thermal shock resistance from 1 700℃ to RT.The change of thermal shock resistance is discussed.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2014年第4期50-54,共5页
Aerospace Materials & Technology