Local structure in quasicrystal-forming Zr-based metallic glasses correlated with a stability of the supercooled liquid state

Junji Saida, Muneyuki Imafuku, Shigeo Sato, Eiichiro Matsubara, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Nanoquasicrystallization and the local structure of several Zr-based metallic glasses were investigated in correlation with a stability of the supercooled liquid state. Single icosahedral quasicrystalline phase (I-phase) formation is confirmed in the Zr70Al10Ni20 ternary and Zr70Cu30 binary metallic glasses with a high stability of the supercooled liquid state by the addition of a small amount of a noble metal such as 0.5-1 at.% Pd or Au. Since the local structure does not change by nanoquasicrystallization as well as by the addition of 1 at.% Pd in the Zr70Al10Ni20 ternary metallic glass on the basis of an extended X-ray absorption fine structure (EXAFS) study, we propose an icosahedral local structure in the quasicrystal-forming metallic glasses. No I-phase formation is observed in the Zr70Ni30 binary alloy by the addition of 1 at.% Pd or Au, in which the stability of the supercooled liquid state is lower than those in the Zr70Cu30, Zr65Al7.5Cu27.5 and Zr70Al10Ni20 alloys. Since the tetragonal Zr2Ni-like local structure is identified in the Zr70Ni30 amorphous alloy, it is concluded that a strong correlation exists between the stability of the supercooled liquid state and the icosahedral local structure in the glassy state in Zr-based metallic glasses.

Original languageEnglish
Pages (from-to)3704-3708
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume353
Issue number32-40
DOIs
Publication statusPublished - 2007 Oct 15

Keywords

  • Amorphous metals, metallic glasses
  • Crystal growth
  • Nanocrystals
  • Phases and equilibria
  • Quasicrystals
  • Short-range order
  • Structure
  • X-rays

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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