Phase-Field Simulation of Spinodal Decomposition in U-50Zr Metallic Nuclear Fuel
During the γ phase–δ phase transition, U-50Zr fuel experiences spinodal decomposition, which has a significant effect on fuel properties. However, little is known about the spinodal decomposition of U-50Zr. The spinodal decomposition behavior in U-50Zr is studied in this research using the phase-fie...
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MDPI AG
2024-09-01
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| author | Yongxiao La Chunyang Wen Linna Feng Yihui Luo Di Yun Wenbo Liu |
| author_facet | Yongxiao La Chunyang Wen Linna Feng Yihui Luo Di Yun Wenbo Liu |
| author_sort | Yongxiao La |
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| description | During the γ phase–δ phase transition, U-50Zr fuel experiences spinodal decomposition, which has a significant effect on fuel properties. However, little is known about the spinodal decomposition of U-50Zr. The spinodal decomposition behavior in U-50Zr is studied in this research using the phase-field approach. The mechanism of spinodal decomposition from a thermodynamic perspective is studied, and the effects of temperature and grain boundary (GB) on spinodal decomposition are analyzed. It is found that the concentration of U atoms in the U-rich phase formed during spinodal decomposition is as high as 90%. The U-rich phase first appears at the GB position, and precipitation phases appear inside the grain later. Ostwald ripening occurs when larger precipitation phases on the GB absorb isolated smaller precipitation phases inside the grain. The coarsening rate of precipitation phases and the time it takes for spinodal decomposition to achieve equilibrium are both influenced by temperature. |
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| issn | 2079-4991 |
| language | English |
| publishDate | 2024-09-01 |
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| series | Nanomaterials |
| spelling | doaj-art-b2c6df8b1e9d42edbfb95a3a1341c55b2025-08-20T02:16:55ZengMDPI AGNanomaterials2079-49912024-09-011419154810.3390/nano14191548Phase-Field Simulation of Spinodal Decomposition in U-50Zr Metallic Nuclear FuelYongxiao La0Chunyang Wen1Linna Feng2Yihui Luo3Di Yun4Wenbo Liu5Department of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, ChinaDepartment of Materials, School of Natural Sciences, The University of Manchester, Sackville Street, Manchester M13 9PL, UKDepartment of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, ChinaDepartment of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, ChinaDepartment of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, ChinaDepartment of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, ChinaDuring the γ phase–δ phase transition, U-50Zr fuel experiences spinodal decomposition, which has a significant effect on fuel properties. However, little is known about the spinodal decomposition of U-50Zr. The spinodal decomposition behavior in U-50Zr is studied in this research using the phase-field approach. The mechanism of spinodal decomposition from a thermodynamic perspective is studied, and the effects of temperature and grain boundary (GB) on spinodal decomposition are analyzed. It is found that the concentration of U atoms in the U-rich phase formed during spinodal decomposition is as high as 90%. The U-rich phase first appears at the GB position, and precipitation phases appear inside the grain later. Ostwald ripening occurs when larger precipitation phases on the GB absorb isolated smaller precipitation phases inside the grain. The coarsening rate of precipitation phases and the time it takes for spinodal decomposition to achieve equilibrium are both influenced by temperature.https://www.mdpi.com/2079-4991/14/19/1548phase-field modelU-50Zr alloyspinodal decompositiongrain boundary |
| spellingShingle | Yongxiao La Chunyang Wen Linna Feng Yihui Luo Di Yun Wenbo Liu Phase-Field Simulation of Spinodal Decomposition in U-50Zr Metallic Nuclear Fuel Nanomaterials phase-field model U-50Zr alloy spinodal decomposition grain boundary |
| title | Phase-Field Simulation of Spinodal Decomposition in U-50Zr Metallic Nuclear Fuel |
| title_full | Phase-Field Simulation of Spinodal Decomposition in U-50Zr Metallic Nuclear Fuel |
| title_fullStr | Phase-Field Simulation of Spinodal Decomposition in U-50Zr Metallic Nuclear Fuel |
| title_full_unstemmed | Phase-Field Simulation of Spinodal Decomposition in U-50Zr Metallic Nuclear Fuel |
| title_short | Phase-Field Simulation of Spinodal Decomposition in U-50Zr Metallic Nuclear Fuel |
| title_sort | phase field simulation of spinodal decomposition in u 50zr metallic nuclear fuel |
| topic | phase-field model U-50Zr alloy spinodal decomposition grain boundary |
| url | https://www.mdpi.com/2079-4991/14/19/1548 |
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