Nanostructure controlling in Zr-based metallic glasses using icosahedral local structure

J. Saida, H. Kato, A. D. Setyawan, K. Yoshimi, A. Inoue

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Glass-nano(quasi)crystal composite materials based on Zr-Al-Ni-Cu metallic glasses have been synthesized by controlling the nucleation and growth rates of the precipitated phase correlated with a unique icosahedral local structure. It is well known that the Zr65Al7.5Ni10Cu17.5 metallic glass has a high glass-forming ability (GFA), which enables us to produce the glassy sample with a bulky shape. Controlling a substitution of QC-forming elements such as noble metals with Cu and annealing condition, the nanoscale icosahedral quasicrystalline phase (I-phase) with various grain sizes and nucleus densities can be formed. Moreover, we have succeeded to control the nano-QC phase nucleation by changing the atmosphere pressure during casting, which results in the formation of new bulk metallic glasses (BMGs). These nanoscale structure and nucleation controlling techniques in BMGs bring a significant improvement of mechanical properties such as high strength and good ductility.

Original languageEnglish
Pages (from-to)231-234
Number of pages4
JournalJournal of Alloys and Compounds
Volume483
Issue number1-2
DOIs
Publication statusPublished - 2009 Aug 26

Keywords

  • Icosahedral local structure
  • Mechanical property
  • Metallic glasses
  • Nano-composite
  • Quasicrystal

ASJC Scopus subject areas

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

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