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Metals 2012, 2(1), 22-40; doi:10.3390/met2010022

Nanocrystalline Metal Hydrides Obtained by Severe Plastic Deformations

Université du Québec à Trois-Rivières, 3351 des Forges, Trois-Rivières, Québec, G9A 5H7, Canada
Received: 30 November 2011 / Revised: 27 December 2011 / Accepted: 27 December 2011 / Published: 10 January 2012
(This article belongs to the Special Issue Nanocrystalline Metals and Alloys)
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It has recently been shown that Severe Plastic Deformation (SPD) techniques could be used to obtain nanostructured metal hydrides with enhanced hydrogen sorption properties. In this paper we review the different SPD techniques used on metal hydrides and present some specific cases of the effect of cold rolling on the hydrogen storage properties and crystal structure of various types of metal hydrides such as magnesium-based alloys and body centered cubic (BCC) alloys. Results show that generally cold rolling is as effective as ball milling to enhance hydrogen sorption kinetics. However, for some alloys such as TiV0.9Mn1.1 alloy ball milling and cold rolling have detrimental effect on hydrogen capacity. The exact mechanism responsible for the change in hydrogenation properties may not be the same for ball milling and cold rolling. Nevertheless, particle size reduction and texture seems to play a leading role in the hydrogen sorption enhancement of cold rolled metal hydrides.
Keywords: metal hydrides; severe plastic deformation; cold rolling; BCC alloys; magnesium-based alloys metal hydrides; severe plastic deformation; cold rolling; BCC alloys; magnesium-based alloys
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Huot, J. Nanocrystalline Metal Hydrides Obtained by Severe Plastic Deformations. Metals 2012, 2, 22-40.

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