Ni- and Be-free Zr-based bulk metallic glasses with high glass-forming ability and unusual plasticity

Shengli Zhu, Guoqiang Xie, Fengxiang Qin, Xinmin Wang, Akihisa Inoue

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    We developed Ni- and Be-free Zr45+xCu40-xAl7Pd5Nb3 bulk metallic glasses with large glass-forming ability and unusual plasticity. The alloys have large critical diameters (larger than 10mm) in a wide composition range (x=0-20). The Zr50Cu35Al7Pd5Nb3 and Zr55Cu30Al7Pd5Nb3 alloys exhibit the largest critical diameter (between 18 and 20mm). The Zr45+xCu40-xAl7Pd5Nb3 bulk metallic glasses also have large plastic elongation in wide composition range (x=10-17). The Zr62Cu23Al7Pd5Nb3 bulk metallic glass exhibits significant plasticity (over 20% of plastic elongation). With increasing Zr content, the compressive strength decreases except for the Zr67Cu18Al7Pd5Nb3 alloy. The fragility parameters were calculated to evaluate the glass-forming ability and plasticity. The fragility exhibits more sensitive correlation with plasticity than glass-forming ability. The ZrCuAlPdNb bulk metallic glasses have high crystallization activation energies of above 300kJ/mol. The ZrCuAlPdNb bulk metallic glasses are favorable for application to biomaterials.

    Original languageEnglish
    Pages (from-to)166-173
    Number of pages8
    JournalJournal of the Mechanical Behavior of Biomedical Materials
    Volume13
    DOIs
    Publication statusPublished - 2012 Sep

    Keywords

    • Biomaterials
    • Bulk metallic glass
    • Fragility
    • Glass-forming ability
    • Plasticity

    ASJC Scopus subject areas

    • Biomaterials
    • Biomedical Engineering
    • Mechanics of Materials

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