氧化时间对NiCoCrAlYTa涂层/镍基高温合金界面显微组织影响  

Effect of Oxidation Duration on Interface Microstructure of NiCoCrAlYTa Coating on Nickel based Superalloy

作　　者：刘若愚 李军 苗小锋 姬小兰 唐湘林 汪云程 覃春媛 Liu Ruoyu;Li Jun;Miao Xiaofeng;Ji Xiaolan;Tang Xianglin;Wang Yuncheng;Qin Chunyuan(Aecc South Industry Co.,Ltd.,Zhuzhou 412000;Aviation Military Representative Office of the Army Equipment Department in Zhuzhou,Zhuzhou 412000)

机构地区：[1]中国航发南方工业有限公司,株洲412000 [2]陆军装备部驻株洲地区航空军事代表室,株洲412000

出　　处：《热喷涂技术》2023年第1期38-44,共7页Thermal Spray Technology

摘　　要：采用真空等离子喷涂技术在DD407合金和DD6合金上制备了NiCoCrAlYTa涂层。通过SEM、EDS等方法研究了900℃不同氧化时间下经热处理后NiCoCrAlYTa涂层/DD407合金和NiCoCrAlYTa涂层/DD6合金的界面组织。结果表明,随着氧化时间延长,NiCoCrAlYTa涂层/DD407合金界面扩散层组织析出σ相,σ相形状发生明显变化,并且界面扩散层厚度缓慢增加,扩散系数为13.32μm/h;随着氧化时间延长,NiCoCrAlYTa涂层/DD6合金界面扩散层析出TCP相(σ相和μ相),TCP相形状未发生明显变化,并且界面扩散层厚度缓慢增加,扩散系数为3.85μm/h。NiCoCrAlYTa coating was prepared on DD407 alloy and DD6 alloy by vacuum plasma spraying technology.At different oxidation duration,the microstructure of the interface of NiCoCrAlYTa coating/DD407 alloy and NiCoCrAlYTa coating/DD6 alloy in 900℃were studied by SEM、EDS and other methods.The results showed that with the increased of oxidation duration,σphase was precipitated at the interface of NiCoCrAlYTa coating/DD407 alloy,and the shape ofσphase changed significantly,the thickness of the interface diffusion layer increased slowly.The diffusion coefficient of the diffusion layer of was 1.051μm/h.While,with the increase of oxidation duration,TCP phases(σphase andμphase)was precipitated at the interface of NiCoCrAlYTa coating/DD6 alloy,and there was no significant changed about the shape,the thickness of the interface diffusion layer increased slowly and the diffusion coefficient of the diffusion layer was 1.15μm/h.

关 键 词：NiCoCrAlYTa DD6 DD407 氧化时间 界面组织 

分 类 号：TG174.4[金属学及工艺—金属表面处理]