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Volume 15
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10.3390/met15111189
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Article

Equation of State for Aluminum at High Entropies and Internal Energies in Shock Waves

by
Konstantin V. Khishchenko
*,
Kseniya A. Boyarskikh
,
Liliya R. Obruchkova
and
Nikolai N. Seredkin
Joint Institute for High Temperatures of the Russian Academy of Sciences, Izhorskaya 13 Bldg 2, Moscow 125412, Russia
*
Author to whom correspondence should be addressed.
Metals 2025, 15(11), 1189; https://doi.org/10.3390/met15111189 (registering DOI)
Submission received: 11 September 2025 / Revised: 13 October 2025 / Accepted: 21 October 2025 / Published: 25 October 2025
Versions Notes

Abstract

The present theoretical work is devoted to the construction of a model of the equation of state for matter, where the specific volume is used as the thermodynamic potential, and the entropy and the thermal part of the internal energy act as thermodynamic variables. Based on the proposed model, called STEC, calculations were carried out for aluminum in the region of high internal energies and entropies. A comparison of the calculated shock adiabats with the available data from shock-wave experiments indicates that the constructed equation of state describes well the thermodynamic properties of aluminum up to a shock compression pressure of about 1 TPa. The proposed STEC equation-of-state model can be used in numerical simulations of various processes under extreme conditions at high energy densities.
Keywords: equation of state; aluminum; shock wave; high entropies; high internal energies; high energy densities equation of state; aluminum; shock wave; high entropies; high internal energies; high energy densities

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MDPI and ACS Style

Khishchenko, K.V.; Boyarskikh, K.A.; Obruchkova, L.R.; Seredkin, N.N. Equation of State for Aluminum at High Entropies and Internal Energies in Shock Waves. Metals 2025, 15, 1189. https://doi.org/10.3390/met15111189

AMA Style

Khishchenko KV, Boyarskikh KA, Obruchkova LR, Seredkin NN. Equation of State for Aluminum at High Entropies and Internal Energies in Shock Waves. Metals. 2025; 15(11):1189. https://doi.org/10.3390/met15111189

Chicago/Turabian Style

Khishchenko, Konstantin V., Kseniya A. Boyarskikh, Liliya R. Obruchkova, and Nikolai N. Seredkin. 2025. "Equation of State for Aluminum at High Entropies and Internal Energies in Shock Waves" Metals 15, no. 11: 1189. https://doi.org/10.3390/met15111189

APA Style

Khishchenko, K. V., Boyarskikh, K. A., Obruchkova, L. R., & Seredkin, N. N. (2025). Equation of State for Aluminum at High Entropies and Internal Energies in Shock Waves. Metals, 15(11), 1189. https://doi.org/10.3390/met15111189

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