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- Jianzhong Zhang
- Los Alamos Neutron Science Center, Los Alamos National Laboratory 1 , Los Alamos, New Mexico 87545, USA
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- Jinlong Zhu
- Los Alamos Neutron Science Center, Los Alamos National Laboratory 1 , Los Alamos, New Mexico 87545, USA
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- Nenad Velisavljevic
- Dynamic & Energetic Materials Division, Los Alamos National Laboratory 2 , Los Alamos, New Mexico 87545, USA
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- Liping Wang
- High Pressure Science and Engineering Center and Department of Physics and Astronomy, University of Nevada 3 , Las Vegas, Nevada 89154, USA
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- Yusheng Zhao
- High Pressure Science and Engineering Center and Department of Physics and Astronomy, University of Nevada 3 , Las Vegas, Nevada 89154, USA
書誌事項
- 公開日
- 2013-11-05
- DOI
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- 10.1063/1.4828886
- 公開者
- AIP Publishing
この論文をさがす
説明
<jats:p>We conducted in-situ high-pressure synchrotron x-ray experiments on beryllium metal at pressures up to 7.9 GPa and temperatures up to 1373 K. A complete pressure (P)–volume (V)–temperature (T) equation of state (EOS) is determined based on the experiment, which includes temperature derivatives of elastic bulk modulus (at both constant pressure and constant volume) and pressure dependence of thermal expansivity. From this EOS, we calculate thermal pressure, heat capacity at constant volume, and thermodynamic Grüneisen parameter as a function of temperature. Above ∼600 K, our results show notable deviation from theoretical predictions using the quasiharmonic and local-density approximations, indicating that the free energy calculations need to be further improved within the current scheme of approximations.</jats:p>
収録刊行物
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- Journal of Applied Physics
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Journal of Applied Physics 114 (17), 173509-, 2013-11-05
AIP Publishing