先进材料疑固实验室 Morphology control of crystals Laboratory of Advanced Materials Solidification Positive gradient Interface 1lm 70 dx For substance with rough interface(non- facted morphololgy):crystal grows as Undercooling continuous growth.With x t,△Tk↓，vl,the humps on the interface will turned into flat. Solid Liquid Solid Liquid heat 上浒充通大学 SHANGHAI JIAO TONG UNIVERSITYMorphology control of crystals Positive gradient For substance with rough interface (non￾facted morphololgy)：crystal grows as continuous growth. With x , △Tk , υ，the humps on the interface will turned into flat