Evidence of icosahedral short-range order in Zr70Cu30 and Zr70Cu29Pd1 metallic glasses

K. Saksl, H. Franz, P. Jovari, K. Klementlev, E. Welter, A. Ehnes, J. Saida, A. Inoue, Jianzhong Jiang

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Abstract

Change in local atomic environment during crystallization of Zr-based glassy alloys was studied by extended x-ray absorption fine structure (EXAFS) spectroscopy. The formation of icosahedral quasicrystalline phase followed by crystallization of tetragonal CuZr2 has been observed in the Zr70Cu29Pd1 glassy alloy during annealing up to 850 K. On the other hand, the binary Zr70Cu30 alloy shows a single glassy to crystalline CuZr2 phase transformation. The local atomic environment of as-quenched Zr70Cu30 alloy is matched to an icosahedral local atomic configuration, which is similar to that of the as-quenched Zr70Cu29Pd1 alloy and the alloy annealed at 593 K containing icosahedral phase. Considering that the supercooled liquid region appears prior to crystallization in the Zr70Cu30 glassy alloy, the observed results support the theory claiming a strong correlation between the existence of local icosahedral short-range order and stability of the supercooled liquid state.
Original languageEnglish
JournalApplied Physics Letters
Volume83
Issue number19
Pages (from-to)3924-3926
ISSN0003-6951
DOIs
Publication statusPublished - 2003

Bibliographical note

Copyright (2003) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

Keywords

  • TRANSFORMATION
  • AU
  • PD
  • QUASI-CRYSTALLINE PHASE
  • BEHAVIOR
  • STABILITY
  • ALLOYS
  • OXYGEN
  • BULK GLASS

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