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In situ observation of ErD2 formation during D2 loading via neutron diffraction

Published online by Cambridge University Press:  05 March 2012

Mark A. Rodriguez ,
Clark S. Snow ,
Ryan R. Wixom ,
Anna Llobet  and
James F. Browning
Mark A. Rodriguez*
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185-1411
Clark S. Snow
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185-1411
Ryan R. Wixom
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185-1411
Anna Llobet
Affiliation:
Lujan Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
James F. Browning
Affiliation:
Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
*
a)Author to whom correspondence should be addressed. Electronic mail: marodri@sandia.gov
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Abstract

In an effort to better understand the structural changes occurring during hydrogen loading of erbium target materials, we have performed in situ D2 loading of erbium metal (powder) at temperature (450°C) with simultaneous neutron diffraction analysis. This experiment tracked the conversion of Er metal to the α erbium deuteride (solid-solution) phase and then into the β (fluorite) phase. Complete conversion to ErD2.0 was accomplished at 10 Torr D2 pressure with deuterium fully occupying the tetrahedral sites in the fluorite lattice.

Keywords

ErD2D2neutron diffractionphase transitionfluorite phase

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Type
Technical Articles
Information
Powder Diffraction , Volume 26 , Special Issue 2 , June 2011 , pp. 144 - 148
Copyright
Copyright © Cambridge University Press 2011

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