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Phase stability and the equation of state of the transition-metal alloy Mo-Re at high pressure

Guoliang Gu and Yogesh K. Vohra
Phys. Rev. B 47, 11559(R) – Published 1 May 1993
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Abstract

The transition-metal alloy Mo–32 at. % Re was compressed in a diamond anvil cell to 193±8 GPa (volume fraction V/V0=0.721) and studied by x-ray diffraction using a synchrotron source. Copper was used as an internal pressure standard in the experiment. The bcc phase of this Mo-Re alloy was found to be stable to the highest pressure and the expected phase transformation to the hcp phase was not observed. The equation of state of the Mo-Re alloy is compared with its constituent metals. Mo-Re alloys show a rapid decrease in compressibility with increasing Re concentration. The rigid-band model for the alloy along with the first-principles theoretical calculations for pure Mo are not adequate to explain the experimental results.

  • Received 26 January 1993

DOI:https://doi.org/10.1103/PhysRevB.47.11559

©1993 American Physical Society

Authors & Affiliations

Guoliang Gu and Yogesh K. Vohra

  • Department of Physics, University of Alabama at Birmingham, Birmingham, Alabama 35294-1170

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Vol. 47, Iss. 17 — 1 May 1993

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