| Abstract
| - The composition of a solid solution that is growing at conditions well away from equilibrium is not prescribedby equilibrium thermodynamics, but is determined kinetically. It depends both on the surface kinetics and onthe transport of mass and heat to and away from the solidification front. In previous work, we have formulateda model for the kinetic or nonequilibrium segregation taking place at the solidification front enabling theconstruction of kinetic phase diagrams, which gives the growth composition of a solid solution as a functionof the liquid composition and undercooling at the surface. In the present work, we extend this model toinclude both mass and heat transport, giving rise to effective kinetic phase diagrams. An overview of thetendencies in the calculated effective kinetic phase diagrams is given by scanning a large part of the parameterspace, covering different types of materials, including metals, semiconductors, and molecular systems. Wefind striking and characteric differences in the relative contribution of the various processes to the effectivesegregation. For molecular mixtures, interfacial undercooling and heat transport limitation can be expected tobe much more important than for metal and semiconductor mixtures where mass transport limitation isdominant.
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