Calculations of the phase interface constitution during the non-equilibrium growth of binary eutectics

Abstract It is well-known that eutectics do not necessarily grow at the eutectic temperature, or with the eutectic composition. Thus, the eutectic point can be shifted due to nonequilibrium conditions in the system. This fact was observed in many experiments. We try to explain this behaviour on the basis of the study of phase transformation kinetics. We construct the kinetic phase diagrams within the framework of the nucleation theory as well as of the theory of growth on the phase interface. Our models are based on the molecular model of the difference in chemical potential of components for the liquid and solid phases. The proposed model describes the position of the eutectic point very well.