Fluctuation theory of the one-component and binary metallic melt's crystallization in the case of micro- and macro-systems

All types of fluctuation mechanisms resulting in a normal kinetics of the one-component and binary melt's crystallization within a small supercooling region for micro- and macrosystems are systematized. Three principal mechanisms of spontaneous fluctuations acting in the monolayers of two-phase transitional zone in the vicinity of melting temperature for one-component metallic crystals and of the liquidus temperature for binary ones are described. The formulas of kinetic coefficients figuring in the normal law of crystallization conformably to one-component and binary metallic micro- and macrosystems for all types of fluctuation mechanisms are presented. Some peculiarities of each fluctuation mechanism are presented. Some peculiarities of each fluctuation mechanism acting within a small supercooling region of the melt-crystal micro- and macrosystems are pointed out. A comparison of theoretical and experimental data concerning the one-component and binary melt's crystallization kinetics at some small supercoolings is presented. (author)