A new criterion for predicting the glass-forming ability of bulk metallic glasses

Zhilin Long, Hongqin Wei, Yanhuan Ding, Ping Zhang, Guoqiang Xie, Akihisa Inoue

    Research output: Contribution to journalArticlepeer-review

    87 Citations (Scopus)

    Abstract

    Based on the consideration of both the resistance of amorphous phase against crystallization and the stability of under-cooled liquid against competing crystalline phase formation, a criterion ω, defined as Tg/Tx - 2Tg/(Tg + Tl) (Tg, Tx and Tl denote the glass transition temperature, the onset crystallization temperature and the liquidus temperature, respectively), has been proposed for evaluating the glass-forming ability (GFA) of bulk metallic glasses (BMGs). A survey of the readily available experimental data associated with the thermal analysis of various glass-forming alloys shows that the new criterion ω exhibits the best correlation with the maximum section thickness (Dmax) as well as the critical cooling rate (Rc) for glass formation among other criteria proposed in recent years, such as Trg(=Tg/Tl), ΔTx(=Tx - Tg), γ(=Tx/(Tg + Tl)), γm(=(2Tx - Tg)/Tl), ΔTrg(=(Tx - Tg)/(Tl - Tg)), δ(=Tx/(Tl - Tg), φ(=Trg(ΔTx/Tg)0.143, α(=Tx/Tl), β(=(Tx/Tg + Tg/Tl) and β(=Tx × Tg/(Tl - Tx)2). Therefore, it can be anticipated that this new criterion will be used as a useful and efficient guideline for exploring new BMG formers.

    Original languageEnglish
    Pages (from-to)207-219
    Number of pages13
    JournalJournal of Alloys and Compounds
    Volume475
    Issue number1-2
    DOIs
    Publication statusPublished - 2009 May 5

    Keywords

    • Amorphous materials
    • Casting
    • Metals
    • Thermal analysis

    ASJC Scopus subject areas

    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry

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