Fcc Pt的热力学性质和热物理性质的CALPHAD研究

Study on Thermodynamic and Thermophysical Properties of fcc Pt through the CALPHAD Approach

应用CALPHAD方法和改进的Debye—Grtineisen模型对具有fcc（面心立方）结构的纯Pt的热力学性质和热物理性质进行了优化研究。该方法利用一套具有实际物理意义的模型参数，可以准确地描述fccPt在宽广温度（OK-熔点）和压力（常压-极端高压）范围内的大部分热力学性质（包括Gibbs自由能、熵和热容等）和热物理性质（包括体积、热膨胀系数和弹性模量等），揭示了热力学性质和热物理性质的内在联系。

Assessment of thermodynamic and thermophysical properties of fcc Pt has been performed by means of CALPHAD on the basis of a modified Debye-Grtineisen model. This approach, even though employed only a few parameters that have physical meaning, could reproduce not only the experimental data of thermodynamic and thermophysical properties at ambient pressure, but also those at extremely high temperatures and pressures with remarkable accuracy. The internal relations between thermodynamic and thermophysical properties have been demonstrated in this research.