Numerical simulation of a high-energy impact on Al₂O_{3 | Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mekhanika – Tomsk State University Journal of Mathematics and Mechanics. 2025. № 94. DOI: 10.17223/19988621/94/13}

Numerical simulation of a high-energy impact on Al₂O₃

Aluminum oxide (Al₂O_{3) is an important ceramic material with remarkable compressive strength and hardness. Al₂O_{3 is a major component of Earth's mantle which makes a significant contribution to high-pressure physics. The construction of a shock adiabatic curve in a wide range of pressures and the determination of the location of phase transitions under shock-wave loading are associated with the derivation of the equation of state. The shock-wave loading of Al₂O_{3 is numerically simulated using a thermodynamic equilibrium model. The equations of state for the two phases of the material are constructed. The missing parameters are obtained based on the correspondence with the experimental data. The dependences of the heat capacity and entropy on the temperature of both phases are plotted, and shock adiabatic curves in the pressure range from 1 GPa to 1.2 TPa are constructed. The high-pressure phase transition is taken into account in calculations. The obtained results are verified and validated using available data from other authors. The presented results provide a basis for considering the theoretical equation of state under extreme conditions, where, nowadays, the model calculations demonstrate significant diversity.}}}

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Keywords

shock adiabatic curve, polymorphic phase transition, ceramic materials, sapphire, aluminum oxide

Authors

Name	Organization	E-mail
Maevskii Konstantin K.	Lavrentyev Institute of Hydrodynamics of the Siberian Branch of the Russian Academy of Sciences	konstantinm@hydro.nsc.ru

Всего: 1

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