Hydrogen storage in bulk Mg-Ti and Mg-stainless steel multilayer composites synthesized via accumulative roll-bonding (ARB)

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DOIResolve DOI: http://doi.org/10.1016/j.ijhydene.2010.12.006
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TypeArticle
Journal titleInternational Journal of Hydrogen Energy
ISSN0360-3199
Volume36
Issue4
Pages30223036; # of pages: 15
SubjectAbsorption curves; Accumulative roll bonding; Cycling behavior; First cycle; Free surfaces; Heterogeneous nucleation; Hydrogen sorption; Loading amount; Multilayer composite; Pure magnesium; Second phase; Threshold limits; Absorption; Corrosion resistant alloys; Crystallography; Multilayers; Nucleation; Phase interfaces; Roll bonding; Stainless steel; Titanium; Hydrogen storage
AbstractWe have tested the hydrogen storage cycling behavior of bulk centimeter-scale magnesium - titanium and magnesium - stainless steel multilayer composites synthesized by accumulative roll-bonding (ARB). Roll-bonding of either titanium or stainless steel with magnesium allows the reversible hydrogen sorption of the resulting composite at 350°C. Identically roll-bonded pure magnesium can hardly be absorbed at this temperature. In the composites, the kinetics of the first cycle of absorption (also called "activation") improves with increased number of fold and roll (FR) operations. With increasing FR operations the distribution of the Ti phase is progressively refined, and the shape of the absorption curve no longer remains sigmoidal. Increasing the loading amount of the second phase also accelerates the kinetics. This holds true up to a threshold limit. Microscopy analysis performed on 1-2 wt.% hydrogen absorbed composites demonstrates that MgH 2 formed exclusively on various heterogeneous nucleation sites. During activation, MgH 2 nucleation occurred at the Mg-hard phase interfaces. During the subsequent absorption cycles, heterogeneous nucleation primarily occurred in the vicinity of "internal" free surfaces such as cracks. © 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Institute for Nanotechnology
Peer reviewedYes
NPARC number21271967
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Record identifier758241dc-fad8-41ab-9eae-8b43c66df6eb
Record created2014-05-14
Record modified2016-05-09
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