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2010 Volume 26 Issue 1
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2010: Equation of State of Tantalum up to 133GPa, Chinese Physics Letters, 27(1): 202-205.
Citation: 2010: Equation of State of Tantalum up to 133GPa, Chinese Physics Letters, 27(1): 202-205.
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Equation of State of Tantalum up to 133GPa

  • Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049;

  • National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, Mianyang 621900;

  • Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640;

  • 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 B'0 =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.
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通讯作者: 陈斌, bchen63@163.com
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Equation of State of Tantalum up to 133GPa

Abstract: 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 B'0 =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.

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