摘要
利用HfC-TaC对C/SiC-ZrC陶瓷基热结构复合材料进行改性,提升C/SiC-ZrC材料的抗氧化性能。结合前驱体浸渍裂解和化学气相沉积法制备陶瓷基复合材料,并通过静态氧化实验(1600℃/5h和1600℃/20h)检验其抗氧化性能。结合弯曲强度测试和失重情况分析,发现HfC-TaC可以有效改善C/SiC-ZrC复合材料的氧化行为,且能够使其满足力学性能要求。借助X射线衍射仪、扫描电子显微镜和能谱仪等仪器,对复合材料的晶相结构、微观结构等进行了分析,结果显示:均匀的元素分布和基体中各陶瓷组元间良好的融合度是C/SiC-ZrC复合材料抗氧化性能提升的原因。
Hf C-TaC was employed to modify the C/SiC-ZrC composites and to improve their oxidation resistance. The composites were fabricated by the combined process of precursor infiltration and pyrolysis method and chemical vapor deposition method, and the oxidation resistance was evaluated by static oxidation tests(1600 ℃/5 h and 1600 ℃/20 h). According to the test results of flexural strength and mass loss, it is found that Hf C-TaC can effectively improve the anti-oxidation behavior of C/SiC-ZrC composites without obviously decreasing their mechanical properties. By virtue of X-ray diffraction, scanning electron microscopy, and energy dispersive spectrometry, the crystal structure and microstructure of composites were analyzed. Results show that the superior antioxidation behavior of C/SiC-ZrC composites after Hf C-TaC modification can be ascribed to the uniform element distribution and wellintegrated components in the matrix.
作者
陈昊然
杨良伟
张宝鹏
刘伟
宋环君
Chen Haoran;Yang Liangwei;Zhang Baopeng;Liu Wei;Song Huanjun(Research Institute of Aerospace Special Materials and Processing Technology,Beijing 100074,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2022年第7期2349-2355,共7页
Rare Metal Materials and Engineering
