Solid-liquid interfacial energy of the eutectoid β phase in the Al-Zn eutectic system

Keşlioǧlu K., Maraşlı N.

Materials Science and Engineering A, vol.369, no.1-2, pp.294-301, 2004 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 369 Issue: 1-2
  • Publication Date: 2004
  • Doi Number: 10.1016/j.msea.2003.11.033
  • Journal Name: Materials Science and Engineering A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.294-301
  • Keywords: Al-Zn alloy, Gibbs-Thomson coefficient, solid-liquid interface energy, grain boundary energy
  • Istanbul Gelisim University Affiliated: No

Abstract

The equilibrated grain boundary groove shapes for the solid β phase in Al-Zn liquid solutions were observed on quenched samples. From the observed grain boundary groove shapes, the Gibbs-Thomson coefficient for solid β (Al-84 wt.% Zn) in Al-Zn liquid solutions has been determined to be (3.41 ± 0.14) × 10-8 Km with a numerical method. The solid-liquid interfacial energy between solid β and Al-Zn liquid solution has been obtained to be (106.94 ± 9.62) × 10-3 J m-2 from the Gibbs-Thomson equation. The grain boundary energy for the same material has been calculated to be (204.72 ± 22.52) × 10-3 J m-2 from the observed grain boundary groove shapes. The thermal conductivities of the solid and liquid phases for Al-95 wt.% Zn and Al-84 wt.% Zn systems have also been measured. © 2003 Elsevier B.V. All rights reserved.