Situation 1:Fully 先进材料疑固实验室 equilibrium solidification Laboratory of Advanced Materials Solidification To facilitate a fully equilibrium solidification situation,the growth rate of the solid phase has to be very small,so that the following criterion is met: L《VDst L the grown length of the solid crystal within time,t. D=solute atom diffusivity in the solid. In this situation,the solute diffusion in the liquid and solid is complete. 上浒充通大学 SHANGHAI JIAO TONG UNIVERSITYSituation 1: Fully equilibrium solidification • To facilitate a fully equilibrium solidification situation, the growth rate of the solid phase has to be very small, so that the following criterion is met: L = the grown length of the solid crystal within time, t. Ds = solute atom diffusivity in the solid. • In this situation, the solute diffusion in the liquid and solid is complete