Effect of Cr addition on room temperature hydrogenation of TiFe alloys
Effect of Cr addition on room temperature hydrogenation of TiFe alloys
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DOI：
10.1016/j.ijhydene.2021.03.096
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发表时间：
2021-05-18
影响因子：
7.2
通讯作者：
Cho, Young Whan
中科院分区：
文献类型：
--
作者：
Jung, Jee Yun;Lee, Sang-In;Cho, Young Whan
本文讨论了AB_2(Ti(Cr，Fe)_2)相对Ti-Fe-Cr系合金加氢性能的影响。通过改变铬含量制备了5种Ti-Fe-Cr基合金。显微组织分析结果表明，随着铬含量的增加，Ti(Cr，Fe)2相的含量增加。首次氢化测试结果表明，所有合金都可以在室温(30摄氏度)下吸收大量氢气，而不需要单独的活化过程。当AB相中存在Ti(Cr，Fe)2相时，这一行为得到改善；第一次加氢动力学随Ti(Cr，Fe)2相含量的增加而增加。Ti-Fe-Cr基合金第一次氢化动力学的提高归因于AB相与Ti(Cr，Fe)2相界面的协同作用和Ti(Cr，Fe)2相固有的快速氢化作用。但随着Ti(Cr，Fe)2相含量的增加，材料的总储氢量下降。(C)2021年氢能出版物有限责任公司。爱思唯尔有限公司出版。保留所有权利。
This paper discusses the effect of AB2 (Ti(Cr, Fe)2) phase on the hydrogenation properties of a Ti -Fe-Cr alloy system. Five Ti-Fe-Cr based alloys were fabricated by varying the Cr content. The microstructural analysis results revealed that the fraction of the Ti(Cr, Fe)2 phase increased with the increasing Cr content. The first hydrogenation test results indicated that all the alloys could absorb a significant amount of hydrogen at room temperature (30 degrees C) without a separate activation process. This behavior improved when the Ti(Cr, Fe)2 phase existed in the AB phase; the kinetics of the first hydrogenation tended to increase with the fraction of Ti(Cr, Fe)2 phase. The enhancement in the first hydrogenation kinetics of the Ti-Fe-Cr based alloys was attributed to the synergetic effect of the interface between the AB and Ti(Cr, Fe)2 phases and the inherent fast hydrogenation of the Ti(Cr, Fe)2 phase. However, the total hydrogen storage capacity decreased when the fraction of Ti(Cr, Fe)2 phase increased. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.