沈阳航空航天大学学报2025，Vol.42Issue(3)：36-44,9.DOI:10.3969/j.issn.2095-1248.2025.03.005
稀土元素Ce改性对NiCrAlY涂层熔盐热腐蚀性能的影响
Effect of rare earth element Ce modification on hot corrosion property of NiCrAlY coating in molten salt
摘要
Abstract
In order to improve the hot corrosion resistance of TiAl-based alloys in molten salt,rare earth Ce modified NiCrAlY coating was prepared on the surface of TiAl-based alloy by atmospheric plasma spraying technology.The hot corrosion tests in molten salt of NiCrAlY(Ce)coatings were carried out at 900℃for 60 h.The effect of rare earth element Ce on the hot corrosion behavior and mechanism was further discussed.The results show that the addition of rare earth element Ce can improve the hot corrosion resistance of NiCrAlY coating.After hot corrosion at 900℃for 60 h,the corrosion layer on the surface of the NiCrAlY/TiAl coating system peels off severely,causing the failure of the coating.Therefore,the TiAl alloy has suffered from severe corrosion.For the NiCrAlYCe/TiAl coating system,its surface still covers with a complete corrosion layer and only small cracks generat at the interface between the coating and substrate.The NiCrAlYCe coating still possesses hot corrosion resistance property to a certain degree after corrosion.The addition of rare earth element Ce is beneficial to the selective oxidation of Al element,which hindered the formation of spinel oxides.The dense Al2 O3 film blocks the internal diffusion of S element,thereby improving the corrosion resistance of NiCrAlY coating and extending service life of TiAl based alloy.关键词
NiCrAlY/稀土元素/Ce改性/大气等离子喷涂/TiAl/热腐蚀Key words
NiCrAlY/rare earth element/Ce modification/atmospheric plasma spraying/TiAl/hot corrosion分类
航空航天引用本文复制引用
宫雪,刘亚莉,孙鑫,卢瑞祥,魏振东,沈远景,邢跃骞..稀土元素Ce改性对NiCrAlY涂层熔盐热腐蚀性能的影响[J].沈阳航空航天大学学报,2025,42(3):36-44,9.基金项目
国家自然科学基金(项目编号:52001217,52275355). （项目编号:52001217,52275355）
