Hydrogen desorption of Mg-Mg2Ni hypo-eutectic alloys in Air, Ar, C02, N2 and H2

Nogita, K., McDonald, S., Duguid, A., Tsubota, M. and Gu, Q. F. (2013) Hydrogen desorption of Mg-Mg2Ni hypo-eutectic alloys in Air, Ar, C02, N2 and H2. Journal of Alloys and Compounds, 580 SUPPL1: S140-S143. doi:10.1016/j.jallcom.2013.01.006

Author Nogita, K.
McDonald, S.
Duguid, A.
Tsubota, M.
Gu, Q. F.
Title Hydrogen desorption of Mg-Mg2Ni hypo-eutectic alloys in Air, Ar, C02, N2 and H2
Journal name Journal of Alloys and Compounds   Check publisher's open access policy
ISSN 0925-8388
Publication date 2013-01-04
Sub-type Article (original research)
DOI 10.1016/j.jallcom.2013.01.006
Volume 580
Issue SUPPL1
Start page S140
End page S143
Total pages 4
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2014
Language eng
Formatted abstract
The hypo-eutectic Mg-Mg2Ni system can be modified by trace elemental additions of Na which change the microstructure and the functional properties of the alloy. The modified microstructure results in improvements to the hydrogen storage properties. In alloys of optimal composition, it has been shown that the reversible storage of 6.5-7 wt% H2 is possible at a rate of reaction that is realistic for industrial applications. This research investigates the release of H2 in air under atmospheric pressure as well as under 0.2 MPa atmospheres of Ar, CO2, N2, and H2. The release kinetics were characterised using in situ crystallographic phase transformation analysis obtained by synchrotron Powder X-ray diffraction (PXRD) at the Australian Synchrotron. The mole fraction of MgH2, Mg, Mg2Ni, and Mg2NiH4 was determined by Rietveld refinement using RIETAN-FP. It was found that the hydrogen release temperature largely depends on the atmosphere.
Keyword Hydrogen absorption
Rietveld refinement
Synchrotron radiation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2014 Collection
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Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
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Created: Fri, 22 Mar 2013, 13:39:56 EST by Rose Clements on behalf of School of Mechanical and Mining Engineering