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Title: Equation of state of rhenium and application for ultra high pressure calibration

The isothermal equation of state of rhenium has been measured by powder X-ray diffraction experiments up to 144 GPa at room temperature in a diamond anvil cell. A helium pressure transmitting medium was used to minimize the non-hydrostatic stress on the sample. The fit of pressure-volume data yields a bulk modulus K{sub 0} = 352.6 GPa and a pressure derivative of the bulk modulus K′{sub 0}=4.56. This equation of state differs significantly from a recent determination [Dubrovinsky et al., Nat. Commun. 3, 1163 (2012)], giving here a lower pressure at a given volume. The possibility of using rhenium gasket X-ray diffraction signal, with the present equation of state, to evaluate multi-Mbar pressures in the chamber of diamond anvil cells is discussed.
Authors:
; ; ;  [1] ;  [2]
  1. CEA, DAM, DIF, F-91297 Arpajon (France)
  2. European Synchrotron Radiation Facility, BP220, 38043 Grenoble Cedex (France)
Publication Date:
OSTI Identifier:
22275647
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CALIBRATION; COMPRESSION STRENGTH; DIAMONDS; EQUATIONS OF STATE; HELIUM; POWDERS; PRESSURE DEPENDENCE; PRESSURE RANGE GIGA PA; RHENIUM; STRESSES; TEMPERATURE RANGE 0273-0400 K; X-RAY DIFFRACTION