Multiphase equation of state and thermoelastic data for polycrystalline beryllium

Coe, Joshua Damon; Rudin, Sven Peter; Maiorov, Boris Alfredo

doi:10.1063/12.0000902

Title: Multiphase equation of state and thermoelastic data for polycrystalline beryllium

Journal Article · Wed Jan 01 00:00:00 EST 2020 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/12.0000902· OSTI ID:1739930

Coe, Joshua Damon ^[1];

^[1];

^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Here, we describe construction of a new multiphase equation of state (EOS) for beryllium calibrated almost entirely to density functional theory calculations based on the AM05 exchange-correlation functional. The EOS is in tabular form (as SESAME 92025) and includes hcp, bcc, and liquid/plasma phases. We find hcp→bcc transitions at ~325 GPa at zero and room temperatures, and at ~150 GPa on the Hugoniot. Shock melting from the bcc phase proceeds at 205-230 GPa. We also present experimental results for the isentropic bulk modulus as a function of temperature, based on resonant ultrasound spectroscopy measurements.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1739930

Report Number(s):: LA-UR-19-26662; TRN: US2205461

Journal Information:: AIP Conference Proceedings, Vol. 2272, Issue 1; Conference: 21.Biennial Conference of the APS Topical Group on Shock Compression of Condensed Matter (SHOCK19), Portland, OR (United States), 16-21 Jun 2019; ISSN 0094-243X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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75 CONDENSED MATTER PHYSICS
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Title: Multiphase equation of state and thermoelastic data for polycrystalline beryllium

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