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Hydrogen Storage Properties, Metallographic Structures and Phase Transitions of Mg-based Alloys Prepared by Super Lamination Technique

Published online by Cambridge University Press:  01 February 2011

Nobuhiko Takeichi ,
Koji Tanaka ,
Hideaki Tanaka ,
Nobuhiro Kuriyama ,
Tamotsu T Ueda ,
Makoto Tsukahara ,
Hiroshi Miyamura  and
Shiomi Kikuchi
Nobuhiko Takeichi
Affiliation:
n.takeichi@aist.go.jp, AIST, IKEDA, Japan
Koji Tanaka
Affiliation:
koji.tanaka@aist.go.jp, AIST, IKEDA, Japan
Hideaki Tanaka
Affiliation:
tanaka.hide@aist.go.jp, AIST, IKEDA, Japan
Nobuhiro Kuriyama
Affiliation:
kuriyama-n@aist.go.jp, AIST, IKEDA, Japan
Tamotsu T Ueda
Affiliation:
t-ueda@ai-h.aisin.co.jp, IMARA, Kariya, Japan
Makoto Tsukahara
Affiliation:
tsuka@ai-i.aisin.co.jp, IMARA, Kariya, Japan
Hiroshi Miyamura
Affiliation:
miyamura@mat.usp.ac.jp, The University of Shiga Prefecture, Hikone, Japan
Shiomi Kikuchi
Affiliation:
kikuchis@mat.usp.ac.jp, The University of Shiga Prefecture, Hikone, Japan
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Abstract

We have prepared Mg/Pd laminate composites with (Mg/Pd)=6, 3 and 2.5 atom ratios, by a super lamination technique. The homogeneous Mg-Pd intermetallic compounds, Mg6Pd, Mg3Pd and Mg5Pd2, are formed during the initial activation process. We investigated the hydrogen storage properties of these materials. The compounds can reversibly absorb and desorb a large amount of hydrogen, up to 1.46˜0.9 H/M, at 573 K. Except for the Mg5Pd2-hydrogen system, the pressure composition-isotherms show two plateaux. The mechanism of the phase transition during hydrogenation/dehydrogenation was analyzed by in-situ XRD measurements. These intermetallic compounds absorb and desorb hydrogen through reversible multistage disproportionation and recombination processes.

Keywords

Mgx-ray diffraction (XRD)hydrogenation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1128: Symposium U – Advanced Intermetallic-Based Alloys for Extreme Environment and Energy Applications , 2008 , 1128-U01-04
Copyright
Copyright © Materials Research Society 2009

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References

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