Abstract

A new model for solute redistribution in cellular or dendritic growth is presented The mass balance is an integral part of the analysis. A definition of the coefficient of redistribution extent within the solid is formulated on the basis of the description of equilibrium crystal growth. A definition of the coefficient of redistribution intensity within the solid is formulated on the analysis of mass balance in the system. The solute redistribution satisfies the mass balance at each stage of crystal growth. The coefficient of redistribution is the product of coefficients of redistribution extent and intensity. It is a function of back-diffusion parameter, defined in the Brody & Flemings theory.

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