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On the transient oxidation of a Ni-15Cr-6Al alloy

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Abstract

Stages in the development of a protective α-Al2O3 scale on a Ni-15Cr-6Al (wt.%) alloy have been examined. It is shown that prior to the formation of a continuous α-Al2O3 layer, a transient stage of oxidation occurs that consists of a rapid uptake of oxygen with conversion of a thin surface layer of alloy to predominantly spinel and the subsequent development of a discrete layer of Cr2O3. It is also shown that during the transient period of oxidation metastable phases of aluminum oxide are formed which transform to α-Al2O3 upon incorporation into the external oxide scale.

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References

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Authors and Affiliations

  1. Materials Engineering and Research Laboratory, Pratt & Whitney Aircraft, Middletown, Connecticut

    B. H. Kear, F. S. Pettit, D. E. Fornwalt & L. P. Lemaire

Authors
  1. B. H. Kear
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  2. F. S. Pettit
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  3. D. E. Fornwalt
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  4. L. P. Lemaire
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Kear, B.H., Pettit, F.S., Fornwalt, D.E. et al. On the transient oxidation of a Ni-15Cr-6Al alloy. Oxid Met 3, 557–569 (1971). https://doi.org/10.1007/BF00605003

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  • DOI: https://doi.org/10.1007/BF00605003

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