Physical science of materials

Modeling of shock-wave loading of magnesium silicates on the example of forsterite

K. K. Maevskii<sup>ab

a</sup> Lavrentyev Institute of Hydrodynamics of Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia
^b Novosibirsk State University, 630090 Novosibirsk, Russia

Abstract: The results of modeling the shock-wave loading of Mg$_2$SiO$_4$ forsterite, which in this case is considered as a mixture of SiO$_2$ quartz and MgO periclase, are presented. The model is based on the assumption that the components of the mixture under shock-wave loading are in thermodynamic equilibrium. The model allows us to reliably describe the phase transition region. The components of the investigated material are considered as a mixture of low and high pressure phases. Polymorphic phase transitions of quartz and periclase are taken into account in the calculation of forsterite in pressure range from 1 to 1000 GPa. The results are verified by experimental data obtained in dynamic experiments.

Keywords: equation of state, shock adiabat, thermodynamic equality, magnesium silicates, forsterite.

Received: 01.04.2022
Revised: 15.09.2022
Accepted: 25.09.2022

DOI: 10.21883/jtf.2022.12.53749.77-22

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