Ni- and Cu-free Zr-Al-Co-Ag bulk metallic glasses with superior glass-forming ability

Nengbin Hua, Shujie Pang, Yan Li, Jianfeng Wang, Ran Li, Konstantinos Georgarakis, Alain Reza Yavari, Gavin Vaughan, Tao Zhang

    Research output: Contribution to journalArticlepeer-review

    55 Citations (Scopus)

    Abstract

    Ni- and Cu-free Zr-Al-Co-Ag bulk metallic glasses (BMGs) with diameters up to 20 mm were synthesized by copper mold casting. The effects of Ag alloying on the superior glass-forming ability (GFA) of Zr-Al-Co-Ag alloys were studied based on the localized atomic structure and crystallization behavior. High-energy synchrotron radiation x-ray diffraction result reveals that Ag addition in Zr-Al-Co system results in a more homogeneous local atomic structure, which could be an origin for the improved GFA of the Zr-Al-Co-Ag alloy. Crystallization products of the Zr-Al-Co-Ag glassy alloy are more complex than those of the Zr-Al-Co glassy alloy. The Zr-Al-Co-Ag BMGs free from highly toxic elements Ni and Cu exhibited a combination of superior GFA, high compressive fracture strength over 2000 MPa, low Young's modulus of 93 to 94 GPa, and good corrosion resistance in phosphate-buffered solution (PBS), inspiring their potential biomedical applications.

    Original languageEnglish
    Pages (from-to)539-546
    Number of pages8
    JournalJournal of Materials Research
    Volume26
    Issue number4
    DOIs
    Publication statusPublished - 2011 Feb 28

    Keywords

    • Amorphous
    • Biomaterial
    • Structural

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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