Measurements of Interdiffusion Coefficients in Liquid AuGe Alloy

Keiji Tanimoto, Yuki Ando, Koji Suzuki, Yoshihiko Yokoyama, Shinsuke Suzuki

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    As for alloy systems forming amorphous structure, it is very useful to pursue the diffusion mechanism of the eutectic alloys in the vicinity of the eutectic point to elucidate the amorphous developmental process. We therefore investigated interdiffusion coefficients in the liquid state of AuGe and AuSi alloy, which remarkably have the deep eutectic temperature. The diffusion experiments using a shear cell device were performed in the temperature range from 686 K to 1073 K. The acquired data seem to be reliable, because they were reproducible and overlapping well on fitting curves so that the convection would have been suppressed. As a result, the temperature dependence of the interdiffusion coefficients in the liquid AuGe alloy was expressed in the Arrhenius equation and no peculiarity in the diffusion mechanism was confirmed. The values of interdiffusion coefficient of this study would be highly appropriate considering the past experimental values of self-diffusion coefficients of AuSi alloy and the negative mixing enthalpy of the alloy system. In addition, the previous research on structure analysis in which the shoulder was not observed in the vicinity of the eutectic point supported our confirmation of the Arrhenius expression for the temperature dependence of the interdiffusion coefficients in the liquid AuGe.

    Original languageEnglish
    Pages (from-to)345-351
    Number of pages7
    JournalMicrogravity Science and Technology
    Volume27
    Issue number5
    DOIs
    Publication statusPublished - 2015 Sep 1

    Fingerprint

    Liquid
    Eutectics
    eutectics
    Liquids
    Coefficient
    coefficients
    liquids
    Temperature Dependence
    eutectic alloys
    temperature dependence
    curve fitting
    Temperature
    shoulders
    Self-diffusion
    Curve fitting
    convection
    diffusion coefficient
    Diffusion Coefficient
    enthalpy
    Convection

    Keywords

    • AuGe
    • AuSi
    • Diffusion in liquids
    • Eutectic temperature
    • Microgravity

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)
    • Modelling and Simulation
    • Applied Mathematics

    Cite this

    Measurements of Interdiffusion Coefficients in Liquid AuGe Alloy. / Tanimoto, Keiji; Ando, Yuki; Suzuki, Koji; Yokoyama, Yoshihiko; Suzuki, Shinsuke.

    In: Microgravity Science and Technology, Vol. 27, No. 5, 01.09.2015, p. 345-351.

    Research output: Contribution to journalArticle

    Tanimoto, Keiji ; Ando, Yuki ; Suzuki, Koji ; Yokoyama, Yoshihiko ; Suzuki, Shinsuke. / Measurements of Interdiffusion Coefficients in Liquid AuGe Alloy. In: Microgravity Science and Technology. 2015 ; Vol. 27, No. 5. pp. 345-351.
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