Frolova S. Influence of melt eat treatment on the kinetics of alloys crystallization in the systems In-Bi, Bi-Sb, Sn- Sb, Bi-Cd, Bi-Sn, Cd-Sn, Se-S.

There has been made a device and developed a technique of a joint cyclic (CTA) and differential thermal analysis (DTA) to study the kinetics of the alloy crystallization. There has been fixed a jump-like plot of overcooling as a function of a melt overheating quantity in relation to the melting temperature for the chemical compounds InBi, InSb, melts, and a monotonic dependence for the alloys. Under crystallization of the binary alloys there has been fixed the availability or the lack of the overcoolings in different parts of the constitution diagram. There have been plotted the constitution diagrams for the binary systems In-Bi, Bi-Sb, In-Sb, Bi-Cd, Bi-Sn, Cd-Sn on which overcoolings and an expanded constitution diagram for the ternary system Bi-Cd-Sn; on their base there have been predicted the types of precipitating crystals. There has been suggested a way of determining the degree of crystallinity of tough substances (selenium and hypoeutectic alloy in the system Se-S). There has been made ananalysis of a free Gibb's energy as to temperature for solid solutions and eutectic alloys which allowed to explain the presence or absence of the overcooling, and the ways of their crystallization. There have been calculated thermodynamic and kinetic parameters of crystallization for the binary alloys (a crystal size and the nucleation work, the nucleation rate, a crystallinity degree etc.).