Published January 2010 | Version v1
Journal article Metadata-only

Equation of state of tantalum up to 133GPa

Creators

  • 1. Beijing Synchrotron Radiation Facility, Institue of High Energy Physics, Chinese Academy of Sciences, Beijing (China)
  • 2. National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, Mianyang (China)
  • 3. Guangzhou Inst. of Geochemistry, Chinese Academy of Sciences, Guangzhou (China)

Description

The static equation of state (EOS) of tantalum (Ta) is determined by in situ energy-dispersive synchrotron powder x-ray diffraction in a diamond anvil cell (DAC) up to 133GPa. The body-centered-cubic (bcc) phase of Ta is found to be stable over the entire pressure range investigated. The bulk moduli and its first pressure derivative of Ta are constrained by fitting the determined pressure-volume data to Vinet form EOS: B0=192.65 ± (3.08) GPa and B0'=3.58±(0.11). For the sake of avoiding the affect of non-hydrostatic stress, argon is used as a pressure media. A careful checking of the stress state of the sample is presented simultaneously. (authors)

Additional details

Publishing Information

Journal Title
Chinese Physics Letters
Journal Volume
27
Journal Issue
1
Journal Page Range
[4 p.]
ISSN
0256-307X

INIS

Country of Publication
China
Country of Input or Organization
China
INIS RN
42040114
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ARGON; BCC LATTICES; EQUATIONS OF STATE; HYDROSTATICS; PRESSURE RANGE GIGA PA; STRESSES; SYNCHROTRONS; TANTALUM; X-RAY DIFFRACTION
Descriptors DEC
ACCELERATORS; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CUBIC LATTICES; CYCLIC ACCELERATORS; DIFFRACTION; ELEMENTS; EQUATIONS; FLUIDS; GASES; METALS; NONMETALS; PRESSURE RANGE; RARE GASES; REFRACTORY METALS; SCATTERING; TRANSITION ELEMENTS

Optional Information

Notes
5 figs., 2 tabs., 27 refs.