Nano icosahedral phase in Zr-Pd and Zr-Pt binary alloys

J. Saida, M. Matsushita, A. Inoue

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

It was found that a nano icosahedral phase with a diameter less than 20 nm is formed as a primary crystalline phase in the melt-spun Zr70Pd30 and Zr80Pt20 binary amorphous alloys. The nano icosahedral phase is also formed in the as-quenched state in the Zr80Pt20 binary alloy by controlling the quenching rate. A slight redistribution of approximately 3 at% is observed during the quasicrystallization in the Zr70Pd30 alloy. In contrast, no significant compositional change between the nano icosahedral and residual amorphous phases is observed in the Zr80Pt20 alloy. The icosahedral medium-range order in the diameter range less than approximately 3 nm is observed in the high-resolution electron micrograph of the Zr70Pd30 amorphous alloy. It is suggested that the icosahedral quasicrystalline phase grows with assimilating the icosahedral medium-range order due to a slight redistribution of constitutional elements during quasicrystallization. The formation of the nano icosahedral phase in the Zr70Pd30 and Zr80Pt20 binary alloys seems to be attributed to the existence of the icosahedral medium-range order in the amorphous and/or liquid states.

Original languageEnglish
Pages (from-to)18-23
Number of pages6
JournalJournal of Alloys and Compounds
Volume342
Issue number1-2
DOIs
Publication statusPublished - 2002 Aug 14
Externally publishedYes

Keywords

  • Amorphous materials
  • Nanostructures
  • Phase transition
  • Quasicrystals
  • Rapid quenching

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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