Glass formability and the Al-Au system

Takeshi Egami, Madhusudan Ojha, Donald M. Nicholson, Dmitri V. Louzguine-Luzgin, Na Chen, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The aluminum-gold system exhibits various features that suggest high glass formability, such as a deep eutectic, formation of icosahedral clusters in the intermetallic compound near the eutectic minimum and a strongly negative heat of mixing. However, it is very difficult to form a glass with this system. Various issues related to glass formability are discussed using the Al-Au system as a negative test-case. In particular, the atomic level pressure was calculated from first principles for the first time for Al 2Au, AlAu 2 and AlAu 4 intermetallic compounds. The atomic level pressure is very high in these compounds, suggesting frustrated electronic states which destabilize both crystalline and glassy phases.

Original languageEnglish
Pages (from-to)655-665
Number of pages11
JournalPhilosophical Magazine
Volume92
Issue number6
DOIs
Publication statusPublished - 2012 Feb 21

Keywords

  • aluminum-gold alloy
  • glass formability
  • metallic glass

ASJC Scopus subject areas

  • Condensed Matter Physics

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