Equation of State of Nickel in WDM Region

Results of theoretical calculations and experimental measurements of the equation of state (EOS) in the region of warm dense matter (WDM) are discussed and applied to nickel. The thermodynamic properties of nickel and its phase diagram are calculated with the use of multi‐phase EOS model. Theoretical calculations of thermodynamic properties of the solid, liquid, and plasma phases, and of the critical point, are compared with results of experiments. The analysis deals with thermodynamic properties of solid nickel at T = 0 and 298 K from different band–structure theories, static compression experiments in diamond anvil cells, and the information obtained in shock‐wave experiments. Thermodynamic data in the liquid and plasma states, resulting from traditional thermophysical measurements, ”exploding wire” experiments, and evaluations of the critical point are presented. Numerous shock‐wave experiments for nickel have been done to measure shock adiabats of crystal and porous samples and release isentropes. These data are analyzed in a self‐consistent manner together with all other available data at high pressure. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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