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Oxidation of Cobalt Metal

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Abstract

By means of inert markers of radio-platinum, it has been shown that cobalt metal oxidizes by outward diffusion of cobalt atoms through the oxide. Oxidation rates have been measured at various temperatures and oxygen pressures and have been found to agree with the rates calculated from the Wagner equation and the authors’ values for the diffusion coefficient of cobalt in the oxide. The distribution of radio-cobalt in growing oxide layers has been accurately measured and found to be different from that predicted from the Wagner oxidation theory. Attempts have been made to measure the change of lattice parameter of the oxide with composition.

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Author information

Authors and Affiliations

  1. Mines Branch, Dept. of Mines and Technical Surveys, Ottawa, Ont., Canada

    R. E. Carter

  2. Royal School of Mines, London, England

    F. D. Richardson (Director of the Nuffield Research Group in Extraction Metallurgy)

  3. Dept. of Metallurgy, Massachusetts Institute of Technology, Cambridge, Mass., USA

    C. Wagner (Member AIME, Visiting Professor)

Authors
  1. R. E. Carter
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  2. F. D. Richardson
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  3. C. Wagner
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Additional information

R. E. Carter, Junior Member AIME, formerly Graduate Student, Nuffield Research Group in Extraction Metallurgy, Royal School of Mines, London, England

Discussion of this paper, TP 3942E, may be sent, 2 copies, to AIME by Apr. 1, 1955. Manuscript, June 7, 1954. Chicago Meeting, February 1955.

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Carter, R.E., Richardson, F.D. & Wagner, C. Oxidation of Cobalt Metal. JOM 7, 336–343 (1955). https://doi.org/10.1007/BF03377503

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  • DOI: https://doi.org/10.1007/BF03377503

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