Design of a bulk amorphous alloy containing Cu-Zr with simultaneous improvement in glass-forming ability and plasticity

Seok Wook Lee, Sang Chul Lee, Yu Chan Kim, E. Fleury, Jae Chul Lee

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

We synthesized bulk amorphous alloy systems of Cu43 Zr43Al7X7(X = Be, Ag; numbers indicate at.%), with the objective of simultaneously enhancing the glass-forming ability (GFA) and the plasticity. The alloys not only exhibit high plasticity (∼7%, ∼8%), but also possess enhanced GFA (alloys with 12 and 8 mm diameter). The possible mechanisms underlying this enhanced GFA and plasticity exhibited by these alloys are discussed based on the atomic-packing state and atomistic-scale compositional separation associated with the mixing enthalpy difference. A strategy for designing bulk amorphous alloys with simultaneous improvement in the GFA and the plasticity is proposed from the viewpoint of atomic-packing state and atomistic-scale phase separation.

Original languageEnglish
Pages (from-to)486-492
Number of pages7
JournalJournal of Materials Research
Volume22
Issue number2
DOIs
Publication statusPublished - 2007 Feb

Bibliographical note

Funding Information:
This research was supported by grants from the Nano-structured Materials Technology Development under the 21st Century Frontier R&D Programs (04K1501-00510), and the Basic Research Program (R01-2004-000-10891-0) of the Ministry of Science and Technology, Korea.

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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