Size-dependent undercooling of pure Sn by single particle DSC measurements  

作　　者：YANG Bin GAO YuLa ZOU ChangDong ZHAI QiJie ZHURAVLEV.E SCHICK.C 

机构地区：[1]Shanghai Key Laboratory of Modern Metallurgy & Materials Processing, Shanghai University, Shanghai 200072, China [2]Institute of Physics, University of Rostoek, Wismarsche Str 43-45, 18051 Rostock, Germany

出　　处：《Chinese Science Bulletin》2010年第19期2063-2065,共3页

基　　金：supported by the National Natural Science Foundation of China (50971086);Robert Bosch Foundation (32.5.8003.0025.0/MA01);AM Foundation of STCSM (08520740500);EZ acknowledges support from an European Union funded Marie Curie EST fellowship

摘　　要：The size-dependent solidification undercooling was investigated for single micro-sized particles of pure Sn employing differential scanning calorimeter(DSC).The particles were obtained from a solvent-encapsulation remelting and quenching(SERQ) process.Because of the basically unchanged spherical shape of the measured single particles during a series of continuous heating and cooling processes,it allows studying the independent effect of particle size on undercooling.Applying classical nucleation theory in conjunction with available thermodynamic data yields an increasing undercooling with decreasing particle size.The theoretical description is in good agreement with the experimental data.The size-dependent solidification undercooling was investigated for single micro-sized particles of pure Sn employing differential scanning calorimeter （DSC）. The particles were obtained from a solvent-encapsulation remelting and quenching （SERQ） process. Because of the basically unchanged spherical shape of the measured single particles during a series of continuous heating and cooling processes, it allows studying the independent effect of particle size on undercooling. Applying classical nucleation theory in conjunction with available thermodynamic data yields an increasing undercooling with decreasing particle size. The theoretical description is in good agreement with the experimental data.

关 键 词：粒子测量 过冷度 尺寸依赖性 数码相机 纯锡 球形颗粒 颗粒大小 扫描量热法 

分 类 号：O551.1[理学—热学与物质分子运动论]