Microstructural heredity of the La-Mg-Ni based electrode alloys during annealing

作者：Li, Yiming; An, Xuehui; Liu, Zhuocheng; Zhang, Yanghuan; Ren, Huiping^*

来源：International Journal of Hydrogen Energy, 2019, 44(55): 29344-29355.

DOI：10.1016/j.ijhydene.2019.01.179

• La-Mg-Ni based electrode alloys
• Annealing
• Phase transformation
• Heredity effect

The present work aims on heredity effect between the as-cast and annealed microstructure in the La-Mg-Ni based electrode alloys. Experimental and thermodynamic assessments demonstrate a series of solid state phase transformation reactions taking place successively during the annealing process. Phase constitution, grain size and micro-morphology of the as-cast alloys which have significant effect on the kinetics of the phase transition during annealing are considered to be closely related with the annealed microstructure. Appropriate increasing the casting cooling rate leads to fine microstructure and less LaNi5 and (La,Mg)Ni-2, which is more favorable to development of high abundance of (La,Mg)(2)Ni-7 after annealing.

• 出版日期2019-11-8
• 单位上海大学; 内蒙古科技大学