Structural origin underlying the effect of cooling rate on solidification point  

作　　者：李晨辉 韩秀君 栾英伟 李建国 

机构地区：[1]Laboratory of Advanced Materials Solidification, School of Materials Science and Engineering,Shanghai Jiao Tong University

出　　处：《Chinese Physics B》2015年第11期323-327,共5页中国物理B（英文版）

基　　金：supported by the National Basic Research Program of China(Grant No.2011CB012900);the National Natural Science Foundation of China(Grant No.51171115);the Natural Science Foundation of Shanghai City,China(Grant No.10ZR1415700);the Research Fund for the Doctoral Program of Higher Education of China(Grant No.20100073120008);the Program for New Century Excellent Talents in Universities of China;partially supported by Alexander von Humboldt Foundation

摘　　要：Solidification behaviors of liquid aluminum at different cooling rates were examined via classical molecular dynamics simulation with an embedded atom method potential. The results demonstrate that solidification point decreases with increasing cooling rate. To explain this phenomenon, solid-like cluster in liquid was analyzed by the structural analysis method of bond order parameters. The results reveal that the size of the largest solid-like cluster in deeply undercooled liquid decreases with the increase of cooling rate, which can provide a structural interpretation to the above phenomenon.Solidification behaviors of liquid aluminum at different cooling rates were examined via classical molecular dynamics simulation with an embedded atom method potential. The results demonstrate that solidification point decreases with increasing cooling rate. To explain this phenomenon, solid-like cluster in liquid was analyzed by the structural analysis method of bond order parameters. The results reveal that the size of the largest solid-like cluster in deeply undercooled liquid decreases with the increase of cooling rate, which can provide a structural interpretation to the above phenomenon.

关 键 词：liquid metal undercooled solidification local structure molecular dynamics 

分 类 号：O469[理学—凝聚态物理]