Gadolinium solubility and precipitate identification in Mg-Gd binary alloy
来源期刊：Journal of Rare Earths2012年第10期
论文作者：彭秋明 马宁 李慧
文章页码：1064 - 1068
摘 要：Gadolinium （Gd） solubility in magnesium （Mg） matrix and precipitate composition in Mg-Gd binary alloys were investigated. The alloys containing different Gd contents （10wt.%-35wt.%） were employed to identify Gd solubility after annealing at different temperatures. It was confirmed that the maximum Gd solubility was 22.8wt.% at 550℃ based on the regression analysis method. Mg5+xGd （0<x<2） and Mg3Gd precipitates coexisted in all investigated alloys owing to the strong component segregation during solidification. The fraction of Mg5+xGd（0<x<2） was decreased with the increment of annealing temperature and time. In contrast, Mg3Gd precipitate could not be eliminated even when being annealed at 550℃. This thermal stable precipitate played a significant role in mechanical properties. Therefore, it is very necessary to consider the effect of Mg3Gd precipitate on properties of Mg-Gd based alloys in future.
彭秋明，马宁，李慧
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University
摘 要：Gadolinium （Gd） solubility in magnesium （Mg） matrix and precipitate composition in Mg-Gd binary alloys were investigated. The alloys containing different Gd contents （10wt.%-35wt.%） were employed to identify Gd solubility after annealing at different temperatures. It was confirmed that the maximum Gd solubility was 22.8wt.% at 550℃ based on the regression analysis method. Mg5+xGd （0<x<2） and Mg3Gd precipitates coexisted in all investigated alloys owing to the strong component segregation during solidification. The fraction of Mg5+xGd（0<x<2） was decreased with the increment of annealing temperature and time. In contrast, Mg3Gd precipitate could not be eliminated even when being annealed at 550℃. This thermal stable precipitate played a significant role in mechanical properties. Therefore, it is very necessary to consider the effect of Mg3Gd precipitate on properties of Mg-Gd based alloys in future.
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