| INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Effect of interface anisotropy on tilted growth of eutectics: A phase field study |
| Mei-Rong Jiang(姜美荣), Jun-Jie Li(李俊杰), Zhi-Jun Wang(王志军), and Jin-Cheng Wang(王锦程)† |
| State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China |
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Abstract Interfacial energy anisotropy plays an important role in tilted growth of eutectics. However, previous studies mainly focused on the solid—solid interface energy anisotropy, and whether the solid—liquid interface energy anisotropy can significantly affect the tilted growth of eutectics still remains unclear. In this study, a multi-phase field model is employed to investigate both the effect of solid—liquid interfacial energy anisotropy and the effect of solid—solid interfacial energy anisotropy on tilted growth of eutectics. The findings reveal that both the solid—liquid interfacial energy anisotropy and the solid—solid interfacial energy anisotropy can induce the tilted growth of eutectics. The results also demonstrate that when the rotation angle is within a range of 30°—60°, the growth of tilted eutectics is governed jointly by the solid—solid interfacial energy anisotropy and the solid—liquid interfacial energy anisotropy; otherwise, it is mainly controlled by the solid—solid interfacial energy anisotropy. Further analysis shows that the unequal pinning angle at triple point caused by the adjustment of the force balance results in different solute-diffusion rates on both sides of triple point. This will further induce an asymmetrical concentration distribution along the pulling direction near the solid—liquid interface and the tilted growth of eutectics. Our findings not only shed light on the formation mechanism of tilted eutectics but also provide theoretical guidance for controlling the microstructure evolution during eutectic solidification.
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Received: 15 April 2022
Revised: 25 May 2022
Accepted manuscript online:
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PACS:
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81.16.Rf
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(Micro- and nanoscale pattern formation)
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81.10.Aj
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(Theory and models of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
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81.30.Fb
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(Solidification)
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81.10.Dn
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(Growth from solutions)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51871183 and 51571165). |
Corresponding Authors:
Jin-Cheng Wang
E-mail: jchwang@nwpu.edu.cn
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Cite this article:
Mei-Rong Jiang(姜美荣), Jun-Jie Li(李俊杰), Zhi-Jun Wang(王志军), and Jin-Cheng Wang(王锦程) Effect of interface anisotropy on tilted growth of eutectics: A phase field study 2022 Chin. Phys. B 31 108101
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