Direct determination of solid-liquid interfacial mobility in eutectic solidification

Y. Seguchi

doi:10.1016/j.mtcomm.2026.116067

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Direct determination of solid-liquid interfacial mobility in eutectic solidification

2026-09-04

DOI：10.1016/j.mtcomm.2026.116067

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Abstract

En 中文

Understanding the crystal growth process has been a persistent problem in materials science. Although phase-field (PF) simulation can effectively predict solidification behavior and reveal various microstructure formation mechanisms, a novel parameter determination technique is required because of the unreliable parameters used for the simulation. Recently, a data-assimilation-based parameter determination method was proposed to directly determine solid-liquid interface properties using in situ experimental observation data. In this study, we first report that the solid-liquid interfacial properties can be quantitatively determined using a data assimilation technique combined with PF simulations. Further, we demonstrate that interfacial mobility, which is often treated as an adjustable parameter to reproduce microstructure formation, can be determined based on experimental data, including uncertainties. Our findings indicate that effective interfacial mobility, which is often treated as a fitting parameter in PF simulations, can be estimated from experimental observations with quantified uncertainty.

Keywords:

eutectic alloy

Phase-field method

One-directional solidification

Data Assimilation

Ensemble Kalman filter

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