Abstract
IT was suggested by Tammann1 in 1922 that the different rates of oxidation exhibited by iron crystals of different orientations can best be explained by a fixed orientation relationship between the lattice of the iron crystal and the lattice of the oxide film. During the succeeding years, fixed orientation relationships have been demonstrated for reaction products of many kinds, such as recrystallisation structures, products of transformation in the solid state, Widmanstätten figures and others ; in view of the general occurrence of such orientation relationships, it now seems more than likely that oxide (and other) reaction films grown on metal crystals will upon analysis also be found to exhibit fixed orientation relationships. Indeed the results of Finch and Quarrell2, published during the course of our work, seem to prove that films of zinc oxide on zinc, and magnesium oxide on magnesium possess such a relationship, though the analysis does not seem to be complete. We have been successful in demonstrating a fixed orientation relationship for wüstite (“FeO”) films grown on iron, and for cuprous oxide films grown on copper.
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References
Stahl und Eisen, 42, 617 ; 1922.
NATURE, 131, 842, June 10,1933. Proc. Roy. Soc., A, 141, 398; 1933.
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MEHL, R., McCANDLESS, E. & RHINES, F. Orientation of Oxide Films on Metals. Nature 134, 1009 (1934). https://doi.org/10.1038/1341009a0
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DOI: https://doi.org/10.1038/1341009a0
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