Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 44, Issue 55, Pages 29344-29355Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.01.179
Keywords
La-Mg-Ni based electrode alloys; Annealing; Phase transformation; Heredity effect
Categories
Funding
- Natural Science Foundation of China [51501095, 51761032]
- Natural Science Foundation Application of Inner Mongolia [2018MS05040]
- Innovation Foundation of Inner Mongolia University of Science and Technology [2018YQL02]
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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. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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