Nb-Hf合金表面Si-Ti-Cr硅化物涂层在恒温氧化和热震中的高温抗氧化性能  

High-Temperature Oxidation Resistance Performance of Si-Ti-Cr Silicide Coating on Nb-Hf Alloy Surface in Constant Oxidation and Thermal Shock

作　　者：安东阳 刘晨飞[1] 赵爽 张海鹏 邹永纯 唐增武 萧鹏 戴景民[2] 王亚明[3] An Dongyang;Liu Chenfei;Zhao Shuang;Zhang Haipeng;Zou Yongchun;Tang Zengwu;Xiao Peng;Dai Jingmin;Wang Yaming(Beijing Xinghang Mechanical-electrical Equipment Co.,Ltd,Beijing 100074,China;School of Instrumentation Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;Institute for Advanced Ceramics,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]北京星航机电装备有限公司,北京100074 [2]哈尔滨工业大学仪器科学与工程学院,黑龙江哈尔滨150001 [3]哈尔滨工业大学特种陶瓷研究所,黑龙江哈尔滨150001

出　　处：《稀有金属材料与工程》2023年第4期1219-1226,共8页Rare Metal Materials and Engineering

基　　金：National Defense Technical Basic Research Program of China(JSZL 2015603 B 002);Aviation Science Fund Project(20172777007);National Natural Science Foundation of China(52206225);China Aerospace Science and Industry Corporation Reliability Assurance Project(2021A007)。

摘　　要：为了提高Nb-Hf合金的高温抗氧化性能,采用浆料烧结和高温渗透制备了Si-Ti-Cr硅化物涂层。分析了Si-Ti-Cr硅化物包覆的Nb-Hf合金样品在恒温氧化和高温热震条件下的抗氧化性能,揭示了Si-Ti-Cr涂层高温恒温氧化和高温热震条件下的失效机理。结果表明,在1800℃恒温氧化5 h条件下,涂层的增重为7 mg/cm^(2);在1700℃热震循环50周次和恒温氧化5 h条件下,涂层的最大增重为1.8mg/cm^(2)。硅化物涂层在1800℃恒温氧化环境下和1700℃热震/恒温氧化环境下具有优异的抗氧化性能。To improve the high-temperature oxidation resistance performance of Nb-Hf alloys,Si-Ti-Cr silicide coatings were prepared on Nb-Hf alloy by slurry sintering and high-temperature permeation methods.The high-temperature oxidation resistance performance of Si-Ti-Cr silicide coating on Nb-Hf alloys in high-temperature constant oxidation and high-temperature thermal shock was analyzed,and the failure mechanism of Si-Ti-Cr coating in high-temperature constant oxidation and high-temperature thermal shock was determined.The results show that the mass gain of the coating is 7 mg/cm^(2)after constant oxidation at 1800℃ for 5 h.The mass gain of the coating in atmosphere is less than 1.8 mg/cm^(2)after thermal shock cycles for 50 cycles followed by constant oxidation at 1700℃ for 5 h.Therefore,the silicide coating exhibits excellent oxidation resistance at 1800℃ in constant oxidation and at 1700℃ in thermal shock/constant oxidation.

关 键 词：硅化物涂层 抗氧化 热震性能 恒温氧化 高温 

分 类 号：TG174.4[金属学及工艺—金属表面处理]