高温合金
腐蚀
材料科学
冶金
熔盐
高温腐蚀
镍
氧化物
管(容器)
复合材料
微观结构
作者
Zehao Chen,Tao Dong,Weiwei Qu,Yi Ru,Heng Zhang,Yanling Pei,Shengkai Gong,Shusuo Li
标识
DOI:10.1016/j.corsci.2019.05.001
摘要
An investigation of hot corrosion was carried out on three single crystal Ni-based superalloys with different Cr contents pre-coated with salt at 900 ℃. Cr can change the hot corrosion performance of alloys by changing the composition of the oxide layer during the hot corrosion process in the open system. At the same time, a "satellite" shaped distribution of internal oxides and sulphides was found. Further, the tube sealing experiment was used to verify the phenomenon occurred inside alloys and in low oxygen condition. A reaction between matrix and molten salt was proposed based on thermodynamics and microscopic observation.
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