Structure-dependent intergranular oxidation in Ni-Fe polycrystalline alloy

S. Yamaura, Y. Igarashi, S. Tsurekawa, T. Watanabe

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    56 Citations (Scopus)

    Abstract

    The effect of grain-boundary character on intergranular oxidation has been investigated in a Ni-40 at.%Fe polycrystalline alloy. A difference in the extent of intergranular oxidation between coincidence site lattice (hereafter denoted as CSL) boundaries and random boundaries was observed. In general, CSL boundaries were more immune to oxidation than random boundaries. Some specific CSL boundaries (Σ3,11,19) were more resistant to oxidation than other CSL boundaries. This can be explained by a special feature of the grain-boundary energy for f.c.c. crystal structures. It is evident that in addition to the relative orientation relationship some geometrical parameters, such as grain-boundary inclination, are needed for the more precise engineering of grain boundaries to control intergranular oxidation.

    Original languageEnglish
    Pages (from-to)1163-1174
    Number of pages12
    JournalActa Materialia
    Volume47
    Issue number4
    DOIs
    Publication statusPublished - 1999 Mar 10

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Ceramics and Composites
    • Polymers and Plastics
    • Metals and Alloys

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