We present a phase field theory for the nucleation and growth of one and two phase crystals solidifying with different crystallographic orientations in binary alloys. The accuracy of the model is tested for crystal nucleation in single component systems. It is shown that without adjustable parameters the height of the nucleation barrier is predicted with reasonable accuracy. The kinetics of primary solidification is investigated as a function of model parameters under equiaxial conditions. Finally, we study the formation of polycrystalline growth morphologies (disordered dendrites, spherulites and fractal-like aggregates).
|Number of pages||9|
|Journal||Physics and Chemistry of Glasses|
|Publication status||Published - Apr 2004|
ASJC Scopus subject areas
- Ceramics and Composites
- Physical and Theoretical Chemistry