WIDE-RANGE MULTIPHASE EQUATION OF STATE FOR IRON
A. B. Medvedev1,2
1Institute of Experimental Physics (VNIIEF), Russian Federal Nuclear Center, Sarov, 607188 Russia
2Sarov State Physics and Technical Institute, Sarov, 607186 Russia
Keywords: iron, equation of state, phase diagram, melting, evaporation, shock adiabat, isotherm, velocity of sound, viscosity
Abstract
A semi-empirical equation of state for iron with allowance for five condensed phases (α, γ, δ, ε, and liquid phases), evaporation, and thermal ionization is derived. As a whole, results of model calculations are consistent with static and dynamic experimental data in the pressure range from the atmospheric value to ≈10 TPa and in the temperature range from room temperature to ≈105 K. The viscosity of liquid iron under conditions typical for the Earth core is estimated on the basis of the liquid model.
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