| Full text | |
| Author(s): |
Asselli, A. A. C.
;
Leiva, D. R.
;
Huot, J.
;
Kawasaki, M.
;
Langdon, T. G.
;
Botta, W. J.
Total Authors: 6
|
| Document type: | Journal article |
| Source: | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 40, n. 47, p. 6-pg., 2015-12-21. |
| Abstract | |
The hydrogen storage properties of a commercial ZK60 magnesium alloy were investigated after processing by equal-channel angular pressing (ECAP) and accumulative roll-bonding (ARB). Samples were prepared by 6 passes of ECAP and subsequently rolled 25 times. Microstructural characterization was performed using scanning and transmission electron microscopy. The kinetics of hydrogen absorption and desorption were measured in a Sievert-type apparatus. Processing only by ECAP resulted in a very low hydrogen storage capacity of 0.5 wt. %. Additional processing by ARB refined the microstructure and improved the hydrogen absorption. Despite this improvement, the hydrogen capacity was limited to less than 4 wt. %. This limitation was overcome by crushing the materials into small thin plates. The crushed sample from the ECAP material absorbed 4.77 wt. % of hydrogen in 24 h while the capacity of the sample processed by ECAP and ARB was 6.4 wt. %. The results are discussed in terms of morphology and microstructure of the samples. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. (AU) | |
| FAPESP's process: | 05/59594-0 - Properties of amorphous, metastable and nano-structured metallic alloys |
| Grantee: | Walter José Botta Filho |
| Support Opportunities: | Research Projects - Thematic Grants |