Solid-state dewetting and island morphologies in strongly anisotropic materials

SCRIPTA MATERIALIA

卷:115

Article

Jiang, Wei^1,2  Wang, Yan³  Zhao, Quan³  Srolovitz, David J.^4,5  Bao, Weizhu³ 

[1] Wuhan Univ, Sch Math & Stat, Wuhan 430072, Peoples R China

[2] Wuhan Univ, Computat Sci Hubei Key Lab, Wuhan 430072, Peoples R China

[3] Natl Univ Singapore, Dept Math, Singapore 119076, Singapore

[4] Univ Penn, Dept Mat Sci & Engn, 3231 Walnut St, Philadelphia, PA 19104 USA

[5] Univ Penn, Dept Mech Engn & Appl Mech, Philadelphia, PA 19104 USA

关键词: Solid-state dewetting;    Anisotropy;    Winterbottom construction;    Surface diffusion;    Contact line migration;   

DOI  :  10.1016/j.scriptamat.2016.01.018

来源: Elsevier

【 摘 要 】

We propose a sharp-interface continuum model based on a thermodynamic variational approach to investigate the strong anisotropic effect on solid-state dewetting including contact line dynamics. For sufficiently strong surface energy anisotropy, we show that multiple equilibrium shapes may appear that cannot be described by the widely employed Winterbottom construction, i.e., the modified Wulff construction for an island on a substrate. We repair the Winterbottom construction to include multiple equilibrium shapes and employ our evolution model to demonstrate that all such shapes are dynamically accessible. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

Free