Role of valence electrons for formation of glassy alloys

Mikio Fukuhara, Masae Takahashi, Yoshiyuki Kawazoe, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The role of valence electrons for formation of glassy alloys was investigated as a function of their valence electron concentration (VEC). The glass transition temperature Tg of 121 kinds of glassy alloys can be expressed as a linear function of VEC: Tg = 131VEC + 65 (2.3 < VEC < 5.2) for metal/metal bonding type and Tg = -240VEC + 2408 (6.6 < VEC < 9.1) for metal/metalloid bonding one. The thermal stability of the glassy alloys increases by the unsynchronized resonance of electron-pair bonds, and decreases due to increase in covalency by metalloid elements, with an increasing number of valence electrons, respectively. Ab initio molecular orbital calculations of the optimized structures for the Mg monoanion clusters warranted application of the valence electron rule, which is based on a valence electron contribution associated with spd or spf hybridization for glass formation.

Original languageEnglish
Pages (from-to)623-626
Number of pages4
JournalJournal of Alloys and Compounds
Volume483
Issue number1-2
DOIs
Publication statusPublished - 2009 Aug 26

Keywords

  • Electronic rule for formation
  • Glassy alloys
  • Hybridization
  • Valence electrons

ASJC Scopus subject areas

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

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