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説明:

Phase-field (PF) modeling of multiphase and multicomponent material processes where material phases and their external domains coexist, such as sintering, lacks a thermodynamically consistent formulation. To address this issue, this paper introduces a novel multi-phase-field (MPF) model with passive external domain (PED), which is defined as an external region that remains inert and does not contribute to microstructural evolution in the material system. An additional variable associated with concentration fields is incorporated to distinguish between the material and PED without thermodynamic inconsistencies. The model is validated through 2D single-phase simulations, which highlight its ability to capture surface triple junction behavior, consistent with Young’s equation. Its capability is further demonstrated through 3D simulations of a three-phase, ternary system coexisting with a PED. These simulations correctly predict the evolution of the system toward thermodynamic equilibrium, including phase transformations and solute partitioning. Overall, the MPF-PED model provides a robust and physically consistent framework, overcoming the limitations of conventional models in handling external domain to facilitate the realistic simulation of complex material processes.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Phase-field modeling, Microstructure, Multicomponent, CALPHAD

刊行年月日: 2026-03-31

出版者: Informa UK Limited

掲載誌:

• Science and Technology of Advanced Materials: Methods (ISSN: 27660400) 2653418

研究助成金:

• Grant-in-Aid for Early-Career Scientists JP24K17179
• MEXT Program: Data Creation and Utilization-Type Material Research and Development Project JPMXP1122715503

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6244

公開URL: https://doi.org/10.1080/27660400.2026.2653418

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更新時刻: 2026-04-03 09:38:10 +0900

MDRでの公開時刻: 2026-04-03 12:26:43 +0900