Hostname: page-component-78c5997874-t5tsf Total loading time: 0 Render date: 2024-11-10T20:33:47.121Z Has data issue: false hasContentIssue false
  • English
  • Français

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: [email protected]
Get access Rights & Permissions [Opens in a new window]

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Ferrizz, R., Louck, T. J., and King, S. H. (2007). “PCT apparatus: Overview,” Sandia National Laboratories Report No. SAND 2007-8105.Google Scholar
Larson, A. C., and Von Dreele, R. B. (2000). “General structure analysis system (GSAS),” Los Alamos National Laboratory Report No. LAUR 86-748.Google Scholar
Lundin, C. E. (1968). “Thermodynamics of erbium-deuterium system,” Trans. Metall. Soc. AIME TMSAAB 242, 903–1161.Google Scholar
Saw, C. K., Beaudry, B. J., and Stassis, C. (1983). “Location of deuterium in α-scandium,” Phys. Rev. B PLRBAQ 27, 7013–7017. 10.1103/PhysRevB.27.7013CrossRefGoogle Scholar
Tewell, C. R., and King, S. H. (2006). “Observation of metastable erbium trihydride,” Appl. Surf. Sci. ASUSEE 253, 2597–2602. 10.1016/j.apsusc.2006.05.025CrossRefGoogle Scholar
Toby, B. H. (2001). “EXPGUI, a graphical user interface for GSAS,” J. Appl. Crystallogr. JACGAR 34, 210–213. 10.1107/S0021889801002242CrossRefGoogle Scholar
Udovic, T. J., Rush, J. J., and Anderson, I. S. (1994). “Neutron spectroscopic evidence of concentration-dependent hydrogen ordering in the octahedral sublattice of β-TbH2+x,” Phys. Rev. B PLRBAQ 50, 7144–7146. 10.1103/PhysRevB.50.7144CrossRefGoogle Scholar