On melting density gap and non-congruence of phase transitions in models of dusty and colloid plasmas

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Martynova, I.A.^1 ; Iosilevskiy, I.L.^1

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13, Moscow

125412, Russia^1

关键词: Charged systems;    Dispersed phase;    Dusty plasmas;    Freezing liquids;    Gap values;    Liquidus;    Three component model;    Yukawa potentials;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012141/pdf
DOI  :  10.1088/1742-6596/653/1/012141

来源: IOP

【 摘 要 】

Two simplified variants of a dusty, condensed dispersed phase and colloid plasmas models are considered as a thermodynamically equilibrium combination of classical Coulomb particles: a 2-component electroneutral system of macro- and micro-ions (+Z, - 1) and a 3-component electroneutral mixture of macro-ions and two kinds of micro-ions (+Z, -1, +1). The base for a consideration is a phase diagram of dusty plasma by Hamaguchi et al (1997 Phys. Rev. E 56 4671) for an equilibrium charged system with the Yukawa potential. Parameters of a splitting the one-dimensional melting boundaries of the Hamaguchi diagram (i.e. hypothetical melting density gap between separate freezing liquid line (liquidus) and melting crystal line (solidus)) are discussed. Estimation of a density gap value is made. Additional splitting of all phase boundaries in the three-component model because of so-called non-congruency of all phase transitions in this model is discussed also.