新型低密度Nb-Ti合金抗氧化涂层制备及组织性能分析  

Preparation,Microstructure and Property Analysis of Oxidation Resistant Coating for New Low-density Nb-Ti alloy

作　　者：胡国林[1] 姚草根[1] 贾中华[1] 何开民[1] 陈道勇[1] 孙彦波[1] 闫旭波[1] HU Guolin;YAO Caogen;JIA Zhonghua;HE Kaimin;CHEN Daoyong;SUN Yanbo;YAN Xubo(Aerospace Research Institute of Materials&Processing Technology,Beijing 100076)

机构地区：[1]航天材料及工艺研究所,北京100076

出　　处：《宇航材料工艺》2021年第4期136-139,共4页Aerospace Materials & Technology

摘　　要：针对新型低密度Nb-Ti合金抗氧化性能需求,开展了Si-Cr-Ti系抗氧化涂层研究,重点分析了所制备涂层抗氧化性能和微观组织在氧化前后的变化。结果表明,1200℃下涂层寿命大于10 h,涂层抗热震性能良好;涂层与基体之间形成一层扩散层,保证了涂层的结合强度;在高温大气环境下,涂层表面生成一种隔绝氧气填补涂层表面空隙的玻璃质SiO_(2)层,因而具有良好的抗氧化性能。According to the requirements of oxidation resistance of new low-density Nb-Ti alloy,Si-Cr-Ti oxidation resistant coating was studied,focusing on the changes of oxidation resistance and microstructure of the prepared coating before and after oxidation.The results show that coating life is more than 10 hours at 1200℃,and the thermal shock resistance of coating is good;A diffusion layer is formed between coating and substrate to ensure bonding strength of coating;In high temperature atmospheric environment,a glassy SiO_(2)layer which can isolate oxygen and fill the gap is formed on surface layer of coating,so it has good oxidation resistance.

关 键 词：铌钛合金 NbSi_(2) 抗氧化 涂层 

分 类 号：TG442[金属学及工艺—焊接]