期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 38, 期 11, 页码 4622-4627出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2013.01.185
关键词
Hydrogen storage; Severe plastic deformation (SPD); Hydride; Disordering; FeTi intermetallics; Ultrafine-grained
资金
- Japan Society for Promotion of Science (JSPS)
- WPI-I2CNER
- Light Metals Educational Foundation of Japan
- MEXT, Japan
- Kyushu University
- Grants-in-Aid for Scientific Research [10F00080] Funding Source: KAKEN
TiFe is a potential candidate for the stationary hydrogen storage systems, but it requires initial activation to absorb hydrogen. This study shows that TiFe processed by high-pressure torsion (HPT) absorbs and desorbs 1.7 wt.% hydrogen at room temperature without activation. The absorption pressure decreases from 2 MPa in the first hydrogenation cycle to 0.7 MPa in the latter cycles. The HPT-processed TiFe exhibits heterogeneous microstructures composed of nanograins, coarse-grains, amorphous-like phases and disordered phases with a high hardness of similar to 1050 Hv. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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