A Cu-based amorphous alloy with a simultaneous improvement in its glass forming ability and plasticity

Kyou Hyun Kim, Seok Woo Lee, Jae Pyoung Ahn, Eric Fleury, Yu Chan Kim, Jae Chul Lee

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

An amorphous alloy, Cu43Zr43Al7Be 7, was synthesized. The alloy showed a large supercooled liquid region (115°C), a significant glass forming ability (Φ12 mm) and considerable strain to fracture (8-9%), which collectively have not been observed in other Cu-based amorphous alloys. The alloy has a unique microstructure characterized by atomic-scale phase separation, which most likely resulted from the large difference in the mixing enthalpy between the binary pairs. This study discusses a possible mechanism underlying the simultaneous enhancement in the GFA and plasticity by considering the atomic packing state and atomic-scale compositional separation resulting from Al and Be.

Original languageEnglish
Pages (from-to)21-24
Number of pages4
JournalMetals and Materials International
Volume13
Issue number1
DOIs
Publication statusPublished - 2007 Feb

Keywords

  • Bulk amorphous alloy
  • Glass forming ability
  • Liquid phase separation
  • Plasticity

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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