定向镍基高温合金DZ466及其热障涂层的抗热腐蚀性能  

Hot corrosion resistance of direct solidified Ni-based superalloy DZ466 and its thermal barrier coating

作　　者：任维鹏[1] 李青[1] 李相辉[1] 宋尽霞[1] 肖程波[1] 何利民 Ren Weipeng;Li Qing;Li Xianghui;Song Jinxia;Xiao Chengbo;He Limin(Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Beijing 100095,China;Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material,Beijing Institute of Aeronautical Materials,Beijing 100095,China)

机构地区：[1]北京航空材料研究院先进高温结构材料重点实验室,北京100095 [2]北京航空材料研究院航空材料先进腐蚀与防护航空科技重点实验室,北京100095

出　　处：《金属热处理》2018年第8期213-219,共7页Heat Treatment of Metals

基　　金：国家科技重大专项(2012ZX04007-021-03)

摘　　要：采用EB-PVD技术在DZ466合金表面沉积热障涂层。950℃涂盐条件下热腐蚀100 h试验结果表明,DZ466合金表面形成疏松多孔的五层结构的腐蚀产物。相同热腐蚀条件下,由于Cr2O3与Al2O3的复合作用可阻止粘结层进一步的腐蚀和加速氧化,热障涂层中粘结层表面氧化物或腐蚀产物层的厚度比DZ466合金有很大程度的减小,表明（6-8）wt%Y2O3/CoCrAlY型双层结构的热障涂层可在很大程度上改善了DZ466合金的抗熔盐热腐蚀性能。Thermal barrier coating（ TBC） was deposited by electron beam physical vapor deposition（ EB-PVD） on DZ466 superalloy. From corrosion test at 950 ℃ for 100 h under salt deposited situation,it is found that loosen and porous corrosion products with 5 layers structure form on the surface of DZ466 superalloy. Under the same condition,the complex process of Cr2 O3 and Al2 O3 restrains further corrosion and accelerated oxidation,resulting that the thickness of oxides or corrosion product layers on surface of the bond coat cuts down in a large extent. It indicates that corrosion resistance of the superalloy can be improved in a great extent by（ 6 - 8） wt% Y2 O3/CoCrAlY type TBC with two layers structure.

关 键 词：DZ466高温合金 热障涂层 抗热腐蚀性能 

分 类 号：TG174.451[金属学及工艺—金属表面处理]