Cold melting of beryllium: Atomistic view on Z-machine experiments

Journal Article · Tue Jul 21 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4923430· OSTI ID:22490808

Rykounov, A. A.; Sapozhnikov, F. A.; Karavaev, A. V.; Yakovlev, S. V.; Ionov, G. V. ^[1]; Ryzhkov, M. V. ^[2]

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1. Russian Federal Nuclear Center - Zababakhin Institute of Technical Physics (RFNC-VNIITF), 13, Vasiliev Street, Snezhinsk, Chelyabinsk 456770 (Russian Federation)
2. Institute of Solid State Chemistry, Ural Branch of RAS, Yekaterinburg (Russian Federation)

Analysis of phase diagram of beryllium at high pressures and temperatures obtained as a result of ab initio calculations and large scale classical molecular dynamics simulations of beryllium shock loading have shown that the so called cold melting takes place when shock wave propagates through polycrystalline samples. Comparison of ab initio calculation results on sound speed along the Hugoniot with experimental data obtained on Z-machine also evidences for possible manifestation of the cold melting. The last may explain the discrepancy between atomistic simulations and experimental data on the onset of the melting on the Hugoniot.

• OSTI ID: 22490808
• Journal Information: Journal of Applied Physics, Vol. 118, Issue 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BERYLLIUM
MELTING
MOLECULAR DYNAMICS METHOD
PHASE DIAGRAMS
POLYCRYSTALS
SHOCK WAVES
SIMULATION
SOUND WAVES
VELOCITY