Modeling of nucleation and growth in glass-forming alloys using a combination of classical and phase-field theory

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Modeling of nucleation and growth in glass-forming alloys using a combination of classical and phase-field theory

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Publication Article, peer reviewed scientific
Title Modeling of nucleation and growth in glass-forming alloys using a combination of classical and phase-field theory
Author Ericsson, A. ; Fisk, Martin ; Hallberg, H.
Date 2019
English abstract
For metallic glasses, it is of vital importance to understand the glass formation properties and to be able to predict the crystallization process in the supercooled liquid. In the present work, we model the process of nucleation and growth using a combination of classical nucleation and phase-field theory. A diffusion coupled phase-field model is used to evaluate the work of formation and the growth behavior of the critical nucleus. The results are combined with classical nucleation and JMAK theory in order to estimate the glass forming ability of the compositions Cu64Zr36, Cu10Zr7 and CuZr2 in terms of TTT-diagrams and critical cooling rates. It is found that the work of formation of the critical nucleus from the phase-field theory agrees with the classical theory when the critical size is larger than the width of the solid-liquid interface. At smaller critical sizes, the work of formation deviates approximately linearly between the two theories. Furthermore, it is shown that the growth behavior from the phase-field simulations agree with analytical expressions of the growth rate from the classical theory.
DOI https://doi.org/10.1016/j.commatsci.2019.04.008 (link to publisher's fulltext.)
Publisher Elsevier
Host/Issue Computational Materials Science;
Volume 165
ISSN 0927-0256
Language eng (iso)
Subject Metallic glasses
Phase-field
Cu-Zr
Nucleation
Glass-forming ability
Technology
Research Subject Categories::TECHNOLOGY
Handle http://hdl.handle.net/2043/29517 Permalink to this page
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