Nonequilibrium Interface Dynamics:
Hierarchical Modeling and Multiscale Simulation of Materials Interfaces

CSIC Building (#406), Seminar Room 4122.
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Phase Field Theory of Nucleation and Polycrystalline Solidification

Dr. Laszlo Granasy

Research Institute for Solid State Physics and Optics, Budapest, Hungary

Abstract:   A phase field theory of crystal nucleation and growth in alloys is presented. The free en-ergy of critical fluctuations is predicted. The results are compared with experiment and molecular dynamics simulations from literature. Phase field simulations are performed for polycrystalline solidification in anisotropic systems. The Kolmogorov-exponent is evaluated for polycrystalline dendritic solidification and for growing particles interacting via diffusion fields. The formation of various polycrystalline morphologies, including the disordered dendritic, multigrain-eutectic, spherulitic and fractallike structures, is studied.