Composition dependence of crystal growth and its time evolution in supercooled liquid of Zr-Al-Cu glassy metals

T. Fukami, H. Yamamoto, D. Okai, Y. Yokoyama, T. Yamasaki, A. Inoue

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Crystal nucleation and its time evolution during isothermal annealing in supercooled liquid of glassy metals Zr65Al10Cu25 ribbon, Zr50Al10Cu40 ribbon, and Zr50Al10Cu40 bulk are examined using a technique of differential thermal analysis. Time dependence of the fraction of crystallization in supercooled liquid at several temperatures is analyzed by the Johnson-Mehl-Avrami (JMA) formula. The Avrami exponents are 3.0 ± 0.2 for Zr65Al10Cu25 ribbon, and 3.9 ± 0.4 for Zr50Al10Cu40 ribbon and Zr50Al10Cu40 bulk. Relation between grown crystals in the supercooled liquid and the Avrami exponent can be explained reasonably. Plots of the fraction of crystallized volume versus a scaled time normalized by the half time of full crystallization almost collapse on a single curve. This suggests that the crystal growth obeys a universal process. The temperature dependence of the half time is discussed using the Williams-Landel-Ferry function.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume131
Issue number1-3
DOIs
Publication statusPublished - 2006 Jul 15

Keywords

  • Avrami exponent
  • Crystal growth
  • Diffusion-controlled process
  • Scaling law
  • Supercooled liquid
  • Zr-based glassy metal

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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