Letter | Published:

Epitaxial Oxide Growth on Thin Single-crystal Gold – Nickel Alloy Films

Abstract

THE oxidation characteristics of binary alloys and the growth and structure of oxidation products on such alloys have been examined by various investigators1–3. However, the only published evidence on the oriented growth of such oxidation products is that of Honjo2. He has reported on selective oxidation of beryllium in a beryllium-copper alloy and observed that the BeO phase grows with a preferred orientation in which the [00,1] axis is perpendicular to the free surface of the specimen. The origins of this orientation were not explained. This communication describes a novel orientation effect observed in the oxidation of thin epitaxed films of a noble metal alloy containing a small percentage of an easily oxidizable transition metal. The alloy examined was a gold–nickel alloy containing 5 wt. per cent of nickel. The growth and structure of the alloy and its oxide were investigated by transmission and reflexion electron diffraction techniques.

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References

  1. 1

    Thomas, D. E., J. Metals (N.Y.), 3, 926 (1951).

  2. 2

    Honjo, G., J. Phys. Soc. (Japan), 8, 113 (1953).

  3. 3

    Hirashima, M., J. Phys. Soc. (Japan), 10, 1055 (1955).

  4. 4

    Francombe, M. H., Flood, J. J., and Turner, G. L'E., Fifth Intern. Cong. Electron Microscopy, Philadelphia, 1962, 1, DD-8 (Academic Press, New York and London).

  5. 5

    Fukano, Y., J. Phys. Soc. (Japan), 16, 1195 (1961).

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