Nb-Hf合金表面Si-Ti-Cr硅化物涂层在大气和真空中的高温热震性能  

High-Temperature Thermal Shock Performance of Si-Ti-Cr Silicide Coating on Nb-Hf Alloy Surface in Atmosphere and Vacuum

作　　者：安东阳 刘晨飞[1] 赵爽 张海鹏 唐增武 萧鹏 戴景民[2] 王亚明[3] An Dongyang;Liu Chenfei;Zhao Shuang;Zhang Haipeng;Tang Zengwu;XiaoPeng;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》2022年第11期3974-3980,共7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 Basic Science Research Program(52206225)。

摘　　要：为了提高Nb-Hf合金的高温热震性能,采用浆料烧结和高温渗透法制备了Si-Ti-Cr硅化物涂层,对比分析了Si-Ti-Cr硅化物包覆的Nb-Hf合金样品在大气和真空条件下的高温热震性能。通过模拟在热冲击过程中涂层的温度场和热应力场分布,揭示了Si-Ti-Cr涂层在大气和真空条件下的热冲击失效机理。结果表明,在1300℃热震循环100次条件下,涂层的真空失重小于0.8 mg/cm^(2);在1600℃热震循环200次条件下,涂层的空气增重小于3 mg/cm^(2)。硅化物涂层在1300℃真空环境下和1600℃空气环境下具有优异的抗热震性能。To improve the high-temperature thermal shock performance,the Si-Ti-Cr silicide coatings were prepared on Nb-Hf alloy by slurry sintering and high-temperature permeation methods.The high-temperature thermal shock performance of Si-Ti-Cr silicidecoated Nb-Hf alloys in atmosphere and vacuum was comparatively analyzed.The failure mechanism of Si-Ti-Cr coating in atmosphere and vacuum after thermal shock tests was determined by simulating the temperature and thermal stress distributions of the coating during thermal shock.Results show that the mass loss of the coating in vacuum is less than 0.8 mg/cm^(2) after 100 thermal shock cycles at 1300℃.The mass gain of the coating in atmosphere is less than 3 mg/cm^(2) after 200 thermal shock cycles at 1600℃.Therefore,the silicide coating exhibits excellent thermal shock resistance at 1300℃in vacuum and at 1600℃in atmosphere.

关 键 词：硅化物涂层 热震性能 热应力分布 失效机理 

分 类 号：TG178[金属学及工艺—金属表面处理]