Abstract
For binary liquids with limited miscibility of the components, we provide the corrections to the equation of state which arise from the nonergogic diffusivity. It is shown that these corrections result in lowering of critical miscibility point. In some cases, it may result in a bifurcation of miscibility curve: the mixtures near 50% concentration which are homogeneous at the microscopic level, occur to be too stable to provide a quasi - eutectic triple point. These features provide a new look on the phase diagrams of some binary systems. In present work, we discuss Ga-Pb, Fe-Cu, and Cu-Zr alloys. Our investigation corresponds their complex behavior in liquid state to the shapes of their phase diagrams.
Highlights
Traditional approach to the statistics and dynamics of binary mixture consisting of atoms of A and B type is based on a coarsened lattice gas model
The statistics and thermodynamics are described by partition Z and thermodynamic potential G: Z = exp
If C > 1/2, the shape of the phase diagram changes drastically. It splits into two cupolas, and triple point corresponding to the horizontal line in fig.3 occurs
Summary
Traditional approach to the statistics and dynamics of binary mixture consisting of atoms of A and B type is based on a coarsened lattice gas model. The concentration - temperature phase diagram looks as a cupola dividing two - phase and single - phase domains. In [1, 2] equation (6) was obtained by strict accounting of dynamical limitations. T = J/4, the tendency to the phase separation occurs, and system becomes microheterogeneous: some local volumes doi:10.1088/1742-6596/633/1/012023
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