Formation and properties of Zr-based bulk quasicrystalline alloys with high strength and good ductility

A. Inoue, T. Zhang, M. W. Chen, T. Sakurai, J. Saida, M. Matsushita

Research output: Contribution to journalArticle

101 Citations (Scopus)

Abstract

The crystallization mode of the Zr-Al-Ni-Cu amorphous alloys changed from a single stage to become two stages by the addition of Ag or Pd, and the first-stage exothermic reaction was found to result from the precipitation of nanoscale icosahedral particles with a size of 20 to 50 nm. The precipitation took place by high nucleation and low growth rates in a polymorphous mode for the Ag-containing alloys, and a diffusion-controlled mode for the Pd-containing alloys. The nanoscale mixed structure alloys exhibited improved strength and ductility as compared with the corresponding amorphous single-phase alloys. The findings of the dispersion strengthening as well as the dispersion ductilization gave a future opportunity to fabricate a new bulk nonequilibrium phase alloy by use of the new phenomenon.

Original languageEnglish
Pages (from-to)2195-2208
Number of pages14
JournalJournal of Materials Research
Volume15
Issue number10
DOIs
Publication statusPublished - 2000 Oct

ASJC Scopus subject areas

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

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