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

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journal contribution
posted on 03.11.2017, 11:11 by Laszlo Ratkai, Gyula Toth, Laszlo Kornyei, Tamas Pusztai, Laszlo Granasy
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, we explore the effect of material 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 form when one of the solid phases are faceted, and investigate cases, in which the kinetic anisotropy for the two solid phases are drastically different.

Funding

This work has been supported by the National Agency for Research, Development, and Innovation (NKFIH), Hungary under contract OTKA-K-115959, and by the EU FP7 EU FP7 projects “ENSEMBLE" (Grant Agreement NMP4-SL-2008-213669) and “EXOMET" (contract No. NMP-LA-2012-280421, co-funded by ESA).

History

School

  • Science

Department

  • Mathematical Sciences

Published in

Journal of Materials Science

Volume

52

Issue

10

Pages

5544 - 5558

Citation

RATKAI, L. ...et al., 2017. Phase-field modeling of eutectic structures on the nanoscale: the effect of anisotropy. Journal of Materials Science, 52(10), pp. 5544-5558.

Publisher

© Springer

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

28/01/2017

Publication date

2017-02-07

Copyright date

2017

Notes

This is a post-peer-review, pre-copyedit version of an article published in Journal of Materials Science. The final authenticated version is available online at: https://doi.org/10.1007/s10853-017-0853-8

ISSN

0022-2461

eISSN

1573-4803

Language

en

Exports