Precipitation of icosahedral phase from a supercooled liquid region in Zr65Cu7.5Al7.5Ni10Ag10 metallic glass

J. Saida, M. Matsushita, T. Zhang, A. Inoue, M. W. Chen, T. Sakurai

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    Abstract

    The formation of an icosahedral phase from the rapidly quenched Zr65Cu7.5Al7.5Ni10Ag10 metallic glass was confirmed and the kinetics of the precipitation upon isothermal annealing in the supercooled liquid region were examined by differential scanning calorimetry. Based on the kinetic analysis, it is clarified that the precipitation in the supercooled liquid region takes place by an interfacial controlled growth with a nearly steady-state nucleation rate. The Arrhenius plot between effective time lag, τ, of nucleation and isothermal annealing temperature yields a single linear relation, in which the activation energy for nucleation is evaluated to be 366 kJ/mol. It is concluded that the transformation of amorphous to quasicrystal proceeds by a homogeneous nucleation mode, which is different from those of Pd-U-Si and Al-Cu-V quasicrystals arising from an inhomogeneous distribution of quenched-in nuclei.

    Original languageEnglish
    Pages (from-to)3497-3499
    Number of pages3
    JournalApplied Physics Letters
    Volume75
    Issue number22
    DOIs
    Publication statusPublished - 1999 Nov 29

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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