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Ostwald ripening under temperature gradient: A phase-field study

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Title: Ostwald ripening under temperature gradient: A phase-field study
Authors: Yamada, Ryo Browse this author →KAKEN DB
Inubushi, Haruki Browse this author
Ohno, Munekazu Browse this author →KAKEN DB
Issue Date: 7-Jul-2021
Publisher: American Institute of Physics (AIP)
Journal Title: Journal of Applied Physics
Volume: 130
Issue: 1
Start Page: 015109
Publisher DOI: 10.1063/5.0055198
Abstract: Ostwald ripening under a temperature gradient in binary model alloys is investigated using a quantitative phase-field model. The simulations show that a cube of average radius of a second-phase particle is proportional to time, and the particle size distribution shows self-similarity in a steady state, as with a uniform temperature field. It is found that the growth rate of particles under a temperature gradient is faster than that in the isothermal case, and the steady-state particle size distribution depends on the magnitude of the temperature gradient. Furthermore, the second-phase particles migrate from low temperature regions to high temperature regions when a non-uniform temperature field is applied. The migration velocity of particles, averaged over the whole system, increases with the magnitude of the temperature gradient. On the other hand, the velocity of each particle is not relevant to particle size. Hence, the particle migration is entirely ascribed to the diffusion flux driven by the concentration gradient originating from the temperature dependence of solute solubility.
Rights: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in (citation of published article) and may be found at (URL/link for published article abstract)
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 山田 亮

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