Equation of state for tungsten over a wide range of densities and internal energies

TL;DR

This paper develops a new caloric equation of state for tungsten, covering a wide range of densities and energies, and compares it with existing theoretical and experimental data.

Contribution

It introduces a novel form of the cold-compression curve at 0 K for tungsten's caloric model, extending previous models.

Findings

The new model accurately predicts pressure-density-internal energy relationships.

Calculated shock Hugoniots align well with experimental data.

Thermodynamic characteristics are consistent with theoretical results.

Abstract

A caloric model, which describes the pressure--density--internal-energy relationship in a broad region of condensed-phase states, is applied for tungsten. As distinct from previously known caloric equations of state for this material, a new form of the cold-compression curve at $T = 0$~K is used. Thermodynamic characteristics along the cold curve and shock Hugoniots are calculated for the metal and compared with some theoretical results and experimental data available at high energy densities.