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Article
Three-dimensional crystal-melt Wulff-shape and interfacial stiffness in the Al-Sn binary system
Physical Review B
  • Ralph E. Napolitano, Iowa State University
  • S. Liu, Iowa State University
Document Type
Article
Disciplines
Publication Date
12-6-2004
DOI
10.1103/PhysRevB.70.214103
Abstract

The quantitative determination of the three-dimensional Wulff shape for a metallic crystal-melt system is reported here. The anisotropy of crystal-melt interfacial free energy is experimentally measured for the Al–Sn binary system at temperatures of 300 and 500°C. Equilibrium shapes of liquid droplets entrained within the crystalline phase are measured experimentally on sequential two-dimensional sections, and the three-dimensional Wulff plot is reconstructed. For this system, it is found that a single-parameter description of anisotropy is not sufficient, and the anisotropy is reported using the leading terms of the relevant cubic harmonics. Accordingly, the anisotropy coefficients are determined to be ε1=(1.81±0.36)×10−2 and ε2=(−1.12±0.13)×10−2. In addition, the corresponding normal stiffness components as well as a generalized stiffness are quantified and compared with available predictions from atomistic simulations.

Comments

This article is from Physical Review B 70 (2004): 1, doi:10.1103/PhysRevB.70.214103 . Posted with permission.

Copyright Owner
The American Physical Society
Language
en
Date Available
2014-10-02
File Format
application/pdf
Citation Information
Ralph E. Napolitano and S. Liu. "Three-dimensional crystal-melt Wulff-shape and interfacial stiffness in the Al-Sn binary system" Physical Review B Vol. 70 Iss. 214103 (2004) p. 1 - 11
Available at: http://works.bepress.com/ralph_napolitano/11/