Multiphase Wide-Range Equation of State for Copper
V. M. El'kin, V. N. Mikhailov, A. A. Ovechkin
All-Russian Scientific Research Institute of Technical Physics, Snezhinsk, Russia
Keywords: equation of state, shock compression, phase diagram, critical point
Abstract
This paper presents a semi-empirical multiphase equation of state (EOS) of copper for two solid FCC and BCC phases, as well as a liquid phase with account for vaporization is presented. A wide range of experimental and theoretical data is used to parameterize the EOS. In the field of plasma states of matter, calculations are performed using the RESEOS average atom model and are also applied to develop the EOS. Curves are plotted for FCC-BCC phase transition, for melting, and for liquid-vapor transition. In general, the EOS-based calculations are in good agreement with the experimental data and the results of theoretical calculations in a wide range of temperatures and pressures.
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