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An in situ neutron diffraction measurement of the pressure-temperature evolution of a MgD2:TiD2 mixture

Moser, D, Bull, DJ, Cowpe, JS, Roach, D, Ross, DK, Noreus, D and Tucker, MG 2010, 'An in situ neutron diffraction measurement of the pressure-temperature evolution of a MgD2:TiD2 mixture' , High Pressure Research, 30 (4) , pp. 643-652.

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Abstract

The hydrogen storage capacity of Mg–Ti–H films is approximately five times that of conventional metal hydride electrodes in NiMH-batteries. Mg and Ti are considered to be immiscible in the bulk and the ambient pressure phase diagram of Mg and Ti indicates that no binary stable bulk compounds are formed. However, in the presence of hydrogen, an Mg–Ti–H phase has been obtained by Kyoi et al. using a high pressure synthesis – where magnesium hydride is compacted with different TM-hydrides in an anvil cell at pressures of the order several GPa (4–8 GPa) and at a temperature of 873 K. In this work, we have proved the feasibility of in situ powder diffraction using the Paris–Edinburgh high pressure cell for the observation of structural changes on this system and we propose modifications to improve the output of the experiment. Keywords: structure; phase transition; metal hydrides; neutron diffraction; high pressure cell

Item Type: Article
Themes: Energy
Schools: Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Materials & Physics Research Centre
Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
Journal or Publication Title: High Pressure Research
Publisher: Taylor & Francis
Refereed: Yes
ISSN: 0895-7959
Depositing User: Prof D. Keith Ross
Date Deposited: 22 Jun 2011 08:24
Last Modified: 20 Aug 2013 16:44
URI: http://usir.eprints.org/id/eprint/12653

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