先进材料疑固实验室 Constitutional undercooling Laboratory of Advanced Materials Solidification From previous situation 3 analysis,we know the solute concentrate in front of the interface can be expressed as: c=c(+ Co/k C:concentration of liquid C:Concentration of original liquid k:Solute distribution coefficient R:crystal growth speed D,:diffusion coefficient R>R 上浒充通大学 SHANGHAI JIAO TONG UNIVERSITYConstitutional undercooling From previous situation 3 analysis, we know the solute concentrate in front of the interface can be expressed as: R2> R1 CL: concentration of liquid C0: Concentration of original liquid k: Solute distribution coefficient R: crystal growth speed DL: diffusion coefficient