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Type: Artigo de periódico
Title: Magnesium-Nickel alloy for hydrogen storage produced by melt spinning followed by cold rolling
Author: Leiva, Daniel Rodrigo
Costa, Hevlin Cristina de Almeida
Huot, Jacques
Pinheiro, Tiago Santos
Jorge Junior, Alberto Moreira
Ishikawa, Tomaz Toshimi
Botta Filho, Walter José
Abstract: Severe plastic deformation routes (SPD) have been shown to be attractive for short time preparation of magnesium alloys for hydrogen storage, generating refined microstructures and interesting hydrogen storage properties when compared to the same materials processed by high-energy ball milling (HEBM), but with the benefit of higher air resistance. In this study, we present results of a new processing route for Mg alloys for hydrogen storage: rapid solidification followed by cold work. A Mg97Ni3 alloy was processed by melt spinning (MS) and by extensive cold rolling (CR). Submitting Mg97Ni3 ribbons between steel plates to cold rolling has shown to be a viable procedure, producing a thin cold welded foil, with little material waste. The as-processed material presents a high level of [002] fiber texture, a sub microcrystalline grain structure with a high density of defects, and also a fine dispersion of Mg2Ni nanoparticles. This refined microstructure allied to the developed texture resulted in enhanced activation and H-sorption kinetics properties.
Subject: hydrogen storage materials
metal hydrides
severe plastic deformation
Editor: ABM, ABC, ABPol
Rights: aberto
Identifier DOI: 10.1590/S1516-14392012005000096
Date Issue: 1-Oct-2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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