Golden Mean analysis of bulk metallic glasses with critical diameter over half-inch for their mole fractions of compositions

A. Takeuchi, A. R. Yavari, A. Inoue

研究成果: Article査読

10 被引用数 (Scopus)

抄録

Eighteen bulk metallic glasses (BMGs) with critical diameters over ∼15 mm in Pd-, Zr-, Mg-, Y-, La-, Pt- and Ca-based multicomponent alloys were analyzed for their mole fractions of compositions with Golden Mean (φ{symbol} ∼ 1.618). The results proved that the 18 BMG compositions are describable with mφ{symbol}-n or mΦ-n where Φ-n is φ{symbol}-(n+1) plus φ{symbol}-(n-1) and m and n are positive integers. The maximum difference in fractions between the analyzed and experimental compositions was 0.038. The irrational nature of φ{symbol} makes the compositions of the 18 BMGs different from those of the stoichiometric intermetallic compounds and near eutectic compositions, leading to the high glass-forming ability. The possible prototypes of the 18 BMGs have the ability to form critically-percolated local atomic arrangements for both Metal-Metal and Metal-Metalloid types of BMGs. Golden Mean analysis provides a new alloy design for fractions of alloying elements owing to its irrationality.

本文言語English
ページ(範囲)696-703
ページ数8
ジャーナルIntermetallics
17
9
DOI
出版ステータスPublished - 2009 9月

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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