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説明:

Sintered structures observed in experiments can consist of faceted crystal grains. To predict the formation of such structures, a new phase-field (PF) model of solid-state sintering that can analyze morphological changes and microstructural evolutions considering the strong interface anisotropies of sintered particles was developed in this study. The developed PF model treats the crystal grain orientation-dependent surface and misorientation-dependent grain boundary anisotropies. Furthermore, this model employs quaternions to calculate the particle rotation, eliminating complicated calculations involved in analyzing the crystal orientation in three-dimensional (3D) simulations. The morphological change in a sintered particle and the grain boundary formulation at triple junctions simulated using the developed model were validated by comparing them with theoretical solutions. The neck growth and densification rates were investigated by performing 3D simulations using two particles with interface anisotropies. The simulation results revealed that neck growth and densification are affected by surface energy and mobility anisotropies. A 3D PF simulation using 200 particles demonstrated that the developed PF model can potentially reproduce sintered structures with faceted particles observed in experiments. The PF model provides a promising simulation for predicting the microstructural evolution of actual materials during solid-state sintering.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Phase-field modeling, Solid-state sintering, Anisotropy, Crystal grain orientation

刊行年月日: 2023-04-24

出版者: Elsevier BV

掲載誌:

• Materials Today Communications (ISSN: 23524928) vol. 35 106061

研究助成金:

• Core Research for Evolutional Science and Technology
• Japan Science and Technology Agency JPMJCR18J4

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1016/j.mtcomm.2023.106061

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更新時刻: 2026-08-27 16:23:24 +0900

MDRでの公開時刻: 2026-08-27 18:27:17 +0900