Abstract：Heterogeneous nucleation in a conically shaped pit on the surface of a plane surface substrate is investigated. The growing process of a cluster on the substrate consists of three stages: growing within the conical cavity, at the cavity edge and outside the cavity. In every stage, the thermodynamic criterion of a cluster growing into a nucleus depends on both the conical cavity dimensions and the substrate materials. The free energy barrier for nucleus formation and the condition of twice nucleation are obtained.
[1] Glicksman M E 2011 Principles of Solidification: An Introduction to Modern Casting and Crystal Growth Concepts (New York: Springer) [2] Trivedi R 2005 Scr. Mater.53 47 [3] Volmer M and Flood H 1934 Z. Phys. Chem. A 170 273 [4] Fletcher N H 1958 J. Chem. Phys.29 572 [5] Qian M 2007 Acta Mater.55 943 [6] Balluffi R W, Allen S M and Carter W C 2005 Kinetics of Materials (New Jersey: John Wiley and Sons) [7] Lu J F and Peng X F 2008 Heat Mass Transfer44 889 [8] Leung S N, Park C B and Li H B 2010 J. Cell. Plast.46 441
2014, Vol. 31 
