摘要
难熔金属碳化物改性是提升陶瓷基复合材料抗氧化性能的有效途径。然而,ZrC-HfC-TaC改性对循环氧化烧蚀性能的影响却鲜有报道。利用前驱体浸渍裂解结合化学气相沉积工艺构筑了ZrC-HfC-TaC改性C/SiC复合材料,剖析了1600℃/5 h循环静态氧化后材料的力学强度、化学组成以及微观结构的变化,根据表征结果提出了改性后材料的抗氧化机理,并利用1700℃/4000 s循环氧乙块焰烧蚀试验验证了ZrC-HfC-TaC改性对提升循环氧化烧蚀性能的有效性。研究表明,经过ZrC-HfC-TaC改性的C/SiC复合材料具备优异的高温循环氧化烧蚀性能。
Refractory metal carbides have been widely proven to be an effective strategy to enhance the oxidation resistance of ceramic matrix composites. The modification effect of ZrC-HfC-TaC system on cyclic oxidation and ablation behavior has rarely been explored. Herein, ZrC-HfC-TaC modified C/SiC composites were fabricated by polymer infiltration and pyrolysis and chemical vapor deposition processes. The mechanical strength, chemical composition and microstructure after cyclic static oxidation test under 1600 ℃/5 h were investigated, and the corresponding oxidation mechanism was proposed according to the characterization results. The cyclic oxyacetylene torch tests under 1700 ℃/4000 s were also employed to verify the effectiveness of ZrC-HfC-TaC modification on C/SiC composites. Results suggest that ZrC-HfC-TaC modified C/SiC composites possess outstanding cyclic oxidation and ablation behavior.
作者
陈昊然
刘伟
孙娅楠
冯士杰
杨彤
杨良伟
张宝鹏
宋环君
孙同臣
Chen Haoran;Liu Wei;Sun Yanan;Feng Shijie;Yang Tong;Yang Liangwei;Zhang Baopeng;Song Huanjun;Sun Tongchen(Aerospace Institute of Advanced 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12期4429-4435,共7页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China(22102165)。
关键词
难熔金属碳化物
陶瓷基复合材料
循环静态氧化
循环氧乙炔焰烧蚀
refractory metal carbides
ceramic matrix composites
cyclic static oxidation tests
cyclic oxyacetylene ablation
