Correlation between hydrogen storage properties and textures induced in magnesium through ECAP and cold rolling
Jorge, Alberto Moreira [UNIFESP]
Lima, Gisele Ferreira de [UNIFESP]
Martins Triques, Maria Regina
Botta, Walter Jose
Kiminami, Claudio Shyinti
Nogueira, Ricardo Pereira [UNIFESP]
Yavari, Alain Reza
Langdon, Terence G.
Is part ofInternational Journal of Hydrogen Energy
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It is feasible to obtain a significant enhancement of the hydrogen storage capability in magnesium by selecting an appropriate sequence of mechanical processing. the Mg metal may be produced with different textures which will then give significant differences in the absorption/desorption kinetics and in the incubation times for hydrogenation. Using processing by equal-channel angular pressing (ECAP), different textures may be produced by changing both the numbers of passes through the ECAP die and the ram speed. Significant grain refinement is easily avoided by using commercial coarse-grained magnesium as the starting material. the use of cold rolling after ECAP further increases the preferential texture for hydrogenation. the results show that the hydriding properties are enhanced with a (002) texture where the improved kinetics lie mainly in the initial stages of hydrogenation. An incubation time is associated with the presence of a (101) texture and this is probably due to the magnesium oxide stability in this direction. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier B.V. All rights reserved.
CitationInternational Journal of Hydrogen Energy. Oxford: Pergamon-Elsevier B.V., v. 39, n. 8, p. 3810-3821, 2014.
SponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
European Research Council
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