Spatial heterogeneity in liquid–liquid phase transition  

作　　者：段云瑞 李涛 吴维康 李洁 周戌燕 刘思达 李辉 

机构地区：[1]Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials of Ministry of Education, Shandong University, Jinan 250061, China

出　　处：《Chinese Physics B》2017年第3期418-425,共8页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.51271100);the National Basic Research Program of China(Grant No.2012CB825702);the Special Funding in the Project of the Taishan Scholar Construction Engineering

摘　　要：Molecular dynamics simulations are performed to investigate the liquid-liquid phase transition （LLPT） and the spatial heterogeneity in A1-Pb monotectic alloys. The results reveal that homogeneous liquid AI-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 A1 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.Molecular dynamics simulations are performed to investigate the liquid-liquid phase transition （LLPT） and the spatial heterogeneity in A1-Pb monotectic alloys. The results reveal that homogeneous liquid AI-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 A1 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.

关 键 词：spatial heterogeneity liquid-liquid phase transition phase separation 

分 类 号：O552.6[理学—热学与物质分子运动论]