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 journalArticlepeer-review

    38 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

    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 (06K1501-01210), and the Basic Research Program (R01-2004-000-10891-0) of Ministry of Science and Technology, Korea.

    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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