Picosecond acoustics method for measuring the thermodynamical properties of solids and liquids at high pressure and high temperature
Picosecond acoustics method for measuring the thermodynamical properties of solids and liquids at high pressure and high temperature
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DOI：
10.1016/j.ultras.2014.04.011
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发表时间：
2015-02-01
期刊：
影响因子：
4.2
通讯作者：
Philippe, J.
中科院分区：
文献类型：
--
作者：
Decremps, F.;Gauthier, M.;Philippe, J.
基于皮秒声学和金刚石砧室的原始组合，最近的改进，精确测量极端条件下的液体和固体的高超音速声速。为了说明这种技术的能力，结果给出的压力和温度依赖性的声学性质的三个原型的情况下：多晶（铁），单晶（硅）和液体（汞）样品。它示出，这种技术也能够确定的密度作为压力的函数的液体，完整的一套弹性常数的单晶，和任何种类的材料的熔化曲线。高压超快声学光谱技术显然为在以前无法达到的极端条件下测量材料性能提供了机会。除了物理学之外，这种最先进的实验在许多其他领域也很有用，例如非线性声学，海洋学，岩石学。文章最后简要介绍了新的发展和未来的工作方向。(C)2014爱思唯尔有限公司版权所有。
Based on the original combination of picosecond acoustics and diamond anvils cell, recent improvements to accurately measure hypersonic sound velocities of liquids and solids under extreme conditions are described. To illustrate the capability of this technique, results are given on the pressure and temperature dependence of acoustic properties for three prototypical cases: polycrystal (iron), single-crystal (silicon) and liquid (mercury) samples. It is shown that such technique also enables the determination of the density as a function of pressure for liquids, of the complete set of elastic constants for single crystals, and of the melting curve for any kind of material. High pressure ultrafast acoustic spectroscopy technique clearly opens opportunities to measure thermodynamical properties under previously unattainable extreme conditions. Beyond physics, this state-of-the-art experiment would thus be useful in many other fields such as nonlinear acoustics, oceanography, petrology, in of view. A brief description of new developments and future directions of works conclude the article. (C) 2014 Elsevier B.V. All rights reserved.