Global equation of state for copper

Jeff H Peterson, K. G. Honnell, C. W. Greeff, J. D. Johnson, J. C. Boettger, S. D. Crockett

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Scopus citations

Abstract

A new, tabular (SESAME format) equation of state for Cu, suitable for use in hydrodynamic simulations, is described and compared to experimental data. Pressures, internal energies, and Helmholtz free energies are tabulated as functions of temperature and density. The new equation of state builds on the theoretical investigations of Greeff, et al., (J. Phys. Chem. Solids 67, 2033 (2006)), but extends the range of densities and temperatures covered to 10 -5-10 5 g/cc and 0-10 8K. The staticlattice cold curve is modeled using the semi-empirical stabilized jellium equation near ambient densities, LDA and GGA density-functional predictions at moderate compressions, and Thomas- Fermi-Dirac theory at high compressions. The Johnson ionic model, which smoothly interpolates between Debye-like and ideal-gas behavior, is employed to model contributions from atomic motion, and Thomas-Fermi-Dirac theory is used for contributions from thermal electronic excitations. Predictions for the compressibility, principle and porous shock Hugoniot, thermal expansion, heat capacity, and melt line are compared with experimental data.

Original languageEnglish (US)
Title of host publicationShock Compression of Condensed Matter - 2011 - Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
Pages763-766
Number of pages4
DOIs
StatePublished - Jun 13 2012
Event17th Biennial Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, 2011 APS SCCM - Chicago, IL, United States
Duration: Jun 26 2011Jul 1 2011

Publication series

NameAIP Conference Proceedings
Volume1426
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other17th Biennial Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, 2011 APS SCCM
CountryUnited States
CityChicago, IL
Period6/26/117/1/11

Keywords

  • Copper
  • Hugoniot
  • equation of state
  • heat capacity
  • porous Hugoniot

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