Morphology of Electrodeposited Zn/Fe Crystals

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著者

    • OHMORI Yasuya
    • Department of Materials Science and Engineering, Faculty of Engineering, Ehime University
    • OHTSUBO Hiroyuki
    • Department of Materials Science and Engineering, Faculty of Engineering, Ehime University
    • MATSUMOTO Akira
    • Ehime University. Now at Matsushita-Kotobuki Electronics Ind., Ltd.
    • NAKAI Kiyomichi
    • Department of Materials Science and Engineering, Faculty of Ehime University

抄録

Zn/Fe alloy electrodeposition on a low carbon steel sheet has been examined mainly by means of scanning electron microscopy and X-ray diffraction. The results obtained are as follows:<br> The crystal structure and the morphology of the film deposited in a low Fe bath changes from granular η/Γ mixed phases, to pyramidal η-phase crystals and then to layered hexagonal η-phase plates with increasing current density. The initial deposits on the substrates, however, are layered hexagonal η-phase plates at all the current densities examined. The final morphology is determined by the deposits on these η-phase crystals. The <i>c/a</i> ratio of η-phase varies from 1.87 to 1.63 with increasing Fe concentration in the crystals. The morphological change of η-phase crystals can be explained in terms of the atomic configurations on both (0001)<sub>η</sub> and {1100}<sub>η</sub> planes and the <i>c/a</i> ratio.<br> In the case of a high Fe bath, the deposited film is varied from granular η/Γ to cuboidal Γ/Γ<sub>1</sub> mixed phases with increasing current density.

収録刊行物

  • ISIJ international

    ISIJ international 37(4), 404-411, 1997-04-15

    The Iron and Steel Institute of Japan

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