C 69 Cold melting of beryllium: Atomistic view on Z-machine experiments / V. V. Dremov, A. A. Rykounov , F. A. Sapozhnikov , A. V. Karavaev, S. V. Yakovlev, G. V. Ionov, M. V. Ryzhkov // Journal of Applied Physics . - 2015. - Vol. 118, № 3. - P035901. - Bibliogr. : p. 035901-5 (32 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): БЕРИЛЛИЙ -- ПЛАВЛЕНИЕ -- ФАЗОВАЯ ДИАГРАММА Аннотация: 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. |