| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Equation of State of Tantalum up to 133GPa |
| TANG Ling-Yun1, LIU Lei2, LIU Jing1, XIAO Wan-Sheng3, LI Yan-Chun1, LI Xiao-Dong1, BI Yan2 |
| 1Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 1000492National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, Mianyang 6219003Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640 |
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TANG Ling-Yun, LIU Lei, LIU Jing et al 2010 Chin. Phys. Lett. 27 016402 |
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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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| Keywords:
64.30.Ef
62.50.-p
07.35.+k
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Received: 21 September 2009
Published: 30 December 2009
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| PACS: |
64.30.Ef
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(Equations of state of pure metals and alloys)
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62.50.-p
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(High-pressure effects in solids and liquids)
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07.35.+k
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(High-pressure apparatus; shock tubes; diamond anvil cells)
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