Germanium and germanium-gold alloys under shock-wave loading

Abstract

The results of numerical experiments upon modeling thermodynamic parameters such as value of pressure and compression of germanium and its alloys with gold are presented. The calculations were performed using the model TEC (thermodynamic equilibrium components). The model allows us to take into account the phase transition of germanium under shock-wave action. The interest in investigating of the compressibility for such materials is related both to the possibility of creating materials with the necessary properties and to the properties of the materials themselves. The results of calculations are compared with the known experimental results of different authors. The value of pressure and compression for shock wave loading of pure germanium and alloys with germanium as a component of various compositions are calculated.

Numerical modeling of carbides behavior under high-energy liading

“…Although this results in a certain overestimation of temperature of the studied samples, the dynamic parameters of nitrides (such as pressure and compression within the pressure range of 3-800 GPa) were characterized correctly. It should be noted that this model allows one to characterize the pressure, compression, and temperature of a loaded medium (including mixtures with their components undergoing a polymorphic phase transition [47,48]). In view of the possibility of a phase transition of carbon, which was mentioned in [26] ( " the position of the initial section of wave-mass velocity dependences may also be affected by the transition of carbon into the diamond phase, which apparently occurs under these conditions"), it is reasonable to expect that an accurate description of shock-wave loading for carbides undergoing a phase transition under highenergy impact should also be feasible.…”