Effect of substrate micro-morphology on heterogeneous nucleation

作     者：Zhang Ying Wang Meng Lin Xin Huang Weidong 

作者机构：State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi'an 710072ShaanxiChina 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2012年第9卷第3期

页      面：234-238页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 50901061 and 50971102) the National Key Basic Research Project of China (Grant No. 2011CB610402) the Fundamental Research Funds of the State Key Laboratory of Solidification Processing (NWPU), China (Grant Nos. 02-TZ-2008 and 36-TP-2009) 

主　　题：grain refinement heterogeneous nucleation substrate micro-morphology 

摘      要：The heterogeneous nucleation process of NH4Cl crystals from a NH4Cl-70wt.%H2O solution on rough chilling substrates was considered in this paper. Scratched and etched substrates of aluminum were prepared with different surface morphologies. It was concluded that for nucleation to occur on a rough substrate surface, the wettability or the generally said roughness are not the key factors affecting the heterogeneous nucleation process. Rather the surface morphologies on the nanometer scale, which is close to the scale of the critical nucleation radius, are more important.