Solid-state dewetting and island morphologies in strongly anisotropic materials. (1st April 2016)

• Record Type: Journal Article
• Authors: Jiang, Wei; Wang, Yan; Zhao, Quan; Srolovitz, David J.; Bao, Weizhu
• Is Part Of: Scripta materialia. Volume 115(2016)
• Page Start: 123
• Page End: 127
• Publication Date: 2016-04-01
• Subjects: Solid-state dewetting -- Anisotropy -- Winterbottom construction -- Surface diffusion -- Contact line migration; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.01.018
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: 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. Graphical abstract: