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

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.
Authors:
; ; ; ; ;  [1] ;  [2]
  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)
Publication Date:
OSTI Identifier:
22490808
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BERYLLIUM; MELTING; MOLECULAR DYNAMICS METHOD; PHASE DIAGRAMS; POLYCRYSTALS; SHOCK WAVES; SIMULATION; SOUND WAVES; VELOCITY