SZFI Hírek

Phase-field modeling of eutectic structures on the nanoscale: the effect of anisotropy

L. Rátkai, Gy.I. Tóth, L. Környei, T. Pusztai, and L. Gránásy
J MATER SCI 52(10) 5544–5558

A simple phase-field model is used to address anisotropic eutectic freezing on the
nanoscale in two (2D) and three dimensions (3D). Comparing parameter-free
simulations with experiments, it is demonstrated that the employed model can be
made quantitative for Ag–Cu.Next, weexplore the effect ofmaterial properties and
the conditions of freezing on the eutectic pattern. We find that the anisotropies of
kinetic coefficient and the interfacial free energies (solid–liquid and solid–solid), the
crystal misorientation relative to pulling, the lateral temperature gradient play
essential roles in determining the eutectic pattern. Finally, we explore eutectic
morphologies,which formwhen one of the solid phases are faceted, and investigate
cases, inwhichthe kinetic anisotropy for thetwo solidphases isdrasticallydifferent.

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Beküldte: Gránásy László, 2017. 10. 30. 08.03,   Hír típusa: Cikk,   Megtekintve: 1203 alkalommal