On the Jumps of Volume, Enthalpy and Entropy at the Melting Point, the Thermal Conductivity and Thermal Diffusivity for F.C.C. Au: the Temperature- and Pressure-Dependences
Nguyen Quang Hoc$^1$, Bui Duc Tinh$^1$, Nguyen Duc Hien$^2$, and Le Hong Viet$^3$
$^1$Hanoi National University of Education, 136 Xuan Thuy, Hanoi, Vietnam
$^2$Mac Dinh Chi High School, Chu Pah District, Gia Lai Province, Vietnam
$^3$Tran Quoc Tuan University, Co Dong, Son Tay Town, Hanoi, Vietnam
Received 22.07.2021; final version — 01.11.2021 Download PDF
Abstract
The melting temperature, the jumps of volume, enthalpy and entropy at the melting point, the isothermal compressibility, the thermal expansion coefficient, the heat capacity at constant volume, the Grüneisen parameter, the Debye temperature, the electrical resistivity, the thermal conductivity, and the thermal diffusivity for defective and perfect f.c.c. metals are studied by combining the statistical moment method (SMM), the limiting condition of the absolute stability of the crystalline state, the Clapeyron–Clausius equation, the Debye model, the Grüneisen equation, the Wiedemann–Franz law and the Mott equation. Numerical calculations are carried out for Au under high temperature and pressure. Calculated melting curve of Au is in a good agreement with experiments and other calculations. Obtained results are predictive and orient towards new experiments.
Keywords: jumps of volume, enthalpy and entropy at the melting point, thermal conductivity, thermal diffusivity, statistical moment method.
DOI: https://doi.org/10.15407/ufm.22.04.511
Citation: Nguyen Quang Hoc, Bui Duc Tinh, Nguyen Duc Hien, and Le Hong Viet, On the Jumps of Volume, Enthalpy and Entropy at the Melting Point, the Thermal Conductivity and Thermal Diffusivity for F.C.C. Au: the Temperature- and Pressure-Dependences, Progress in Physics of Metals, 22, No. 4: 511–530 (2021)