| CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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Spatial heterogeneity in liquid-liquid phase transition |
| Yun-Rui Duan(段云瑞), Tao Li(李涛), Wei-Kang Wu(吴维康), Jie Li(李洁), Xu-Yan Zhou(周戌燕), Si-Da Liu(刘思达), Hui Li(李辉) |
| Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials of Ministry of Education, Shandong University, Jinan 250061, China |
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Abstract Molecular dynamics simulations are performed to investigate the liquid-liquid phase transition (LLPT) and the spatial heterogeneity in Al-Pb monotectic alloys. The results reveal that homogeneous liquid Al-Pb alloy undergoes an LLPT, separating into Al-rich and Pb-rich domains, which is quite different from the isocompositional liquid water with a transition between low-density liquid (LDL) and high-density liquid (HDL). With spatial heterogeneity becoming large, LLPT takes place correspondingly. The relationship between the cooling rate, relaxation temperature and percentage of Al and the spatial heterogeneity is also reported. This study may throw light on the relationship between the structure heterogeneity and LLPT, which provides novel strategies to control the microstructures in the fabrication of the material with high performance.
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Received: 24 October 2016
Revised: 06 December 2016
Accepted manuscript online:
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PACS:
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64.70.Ja
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(Liquid-liquid transitions)
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64.75.St
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(Phase separation and segregation in thin films)
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64.60.My
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(Metastable phases)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51271100), the National Basic Research Program of China (Grant No. 2012CB825702), and the Special Funding in the Project of the Taishan Scholar Construction Engineering. |
Corresponding Authors:
Hui Li
E-mail: lihuilmy@hotmail.com
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Cite this article:
Yun-Rui Duan(段云瑞), Tao Li(李涛), Wei-Kang Wu(吴维康), Jie Li(李洁), Xu-Yan Zhou(周戌燕), Si-Da Liu(刘思达), Hui Li(李辉) Spatial heterogeneity in liquid-liquid phase transition 2017 Chin. Phys. B 26 036401
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