Theory of the late-stage crystallization of eutectic composition melts Original Research Article

A theory of late-stage crystallization in eutectic point of binary eutectic melts whose pure components have close melting points is developed. A complete system of equations describing the evolution of an ensemble of nuclei has been obtained. An asymptotic solution to this system of equations shows that there is a strong correlation between precipitates of a different composition, which is related to specific features of the eutectic systems. The main characteristics of dispersed systems of eutectic composition including the distribution function, the critical size and the time dependence of density of nuclei have been found. The effect of heat removal from the system on these characteristics and on the structure of the final solid product has also been studied. Our theoretical results have been confirmed by experimental data.