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Lattice Strains in Gold and Rhenium Under Non-Hydrostatic Compression

Published online by Cambridge University Press:  10 February 2011

T. S. Duffy ,
G. Shen ,
D. L. Heinz ,
Y. Ma ,
R. J. Hemley ,
H. K. Mao  and
A. K. Singh
T. S. Duffy
Affiliation:
Department of Geosciences, Princeton University, Princeton, NJ 08544, duffy@geo.princeton.edu
G. Shen
Affiliation:
Consortium for Advanced Radiation Sources, The University of Chicago, Chicago, IL 60637
D. L. Heinz
Affiliation:
Department of Geophysical Sciences, The University of Chicago, Chicago, IL 60637
Y. Ma
Affiliation:
Geophysical Laboratory and Center for High-Pressure Research, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington DC 20015
R. J. Hemley
Affiliation:
Geophysical Laboratory and Center for High-Pressure Research, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington DC 20015
H. K. Mao
Affiliation:
Geophysical Laboratory and Center for High-Pressure Research, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington DC 20015
A. K. Singh
Affiliation:
Materials Science Division, National Aerospace Laboratories, Bangalore 560 017, India
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Abstract

Lattice strains have been measured as a function of the angle, ψ, from the diamond cell stress axis in a sample of gold and rhenium at pressures of 15–37 GPa. Experiments were conducted using X-ray transparent gaskets made from beryllium. The differential stresses supported by gold and rhenium have been characterized to 37 GPa. It is also shown that proper choice of the diffraction geometry allows recovery of a quasi-hydrostatic compression curve under these highly non-hydrostatic conditions. X-ray elastic moduli have also been determined, and while good agreement with previous data is achieved for gold, there is a large discrepancy between the present results and extrapolated ultrasonic data for rhenium.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 499: Symposium DD – High Pressure Materials Research , 1997 , 145
Copyright
Copyright © Materials Research Society 1998

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References

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