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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.
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