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Combustion, Explosion and Shock Waves

2013 year, number 4

Equations of State of Silver Azide and Calculation of Its Hugoniots

A. M. Molodets, Yu. N. Zhuravlev
Keywords: silver azide, shock compression, equation of state, dynamics of crystal lattice, ab initio calculations

Abstract

The thermal and caloric equation of state of the orthorhombic phase of silver azide are presented. For this material, pressuretemperature relations along the Hugoniots of the material with different porosity and shock velocityparticle velocity relations are calculated. The calculations are performed for pressures up to 3 GPa and temperatures of 300500 K, particle velocities of up to 0.4 km/s, and initial porosity of 11.5. The relative positions of the Hugoniots and equilibrium lines of polymorphic transformations of silver azide in the indicated region of thermodynamic variables is discussed.