Special Features of disordering in Crystallization of Two-Component Metal Melts in the Model of Two-Phase Transitive Zone

The special features of the crystallization processes of 50% two-component metal melts in the model of transitive two-phase zone (TTZ) whose structure is described by the system of stationary kinetic transcendental equations are investigated. The influence of the TTZ structure and crystallization temperature of the system two-component metal melt – crystal on the frequencies of joining of step-growth monomers to TTZ monolayers is considered. It is demonstrated that in this case, the disordering process of two-component crystals at temperatures smaller than the Curie temperature follows the Bragg–Williams thermodynamic transition. It is noted that at the point of the two-component crystal disordering, the average crystallization rate has a singularity in the form of a finite jump whose value is proportional to the squared long-order parameter.