The Growth of Oxide Crystallites during the Oxidation of Iron in Carbon Dioxide within the Scanning Electron Microscope

  • A. M. Brown
  • P. L. Surman


Pure iron single crystals and polycrystalline iron sheet have been oxidised on a hot stage within the Scanning Electron Microscope (S.E.M.). The oxidant, a carbon dioxide/carbon monoxide gas mixture, was delivered to the specimen surface from a capillary tube which produced a local specimen surface pressure of up to 200 N m-2, without significantly reducing the resolution of the S.E.M.

It is postulated that the rate controlling step for crystallite growth, at low pressure, is the dissociation of carbon dioxide at the surface, whereas at higher pressures the surface diffusion of iron is probably rate controlling. The effect of substrate orientation upon these steps is also discussed.


Oxide Film Surface Pressure Crystallite Growth Iron Single Crystal Oxide Crystallite 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. (1).
    A.M. Brown and P.L. Surman, Surface Sci., 1975, 52, 85.CrossRefGoogle Scholar
  2. (2).
    F.S. Pettit and J.B. Wagner, Acta Met., 1964, 12, 35.CrossRefGoogle Scholar
  3. (3).
    M.B. Ives,Localised Corrosion,Nat.Assoc.Corr.Eng., Williamsburg Virginia, 1971, p. 78Google Scholar
  4. (4).
    W.H. Hirtle, N.R. Adsit and J.O. Brittain, Direct Observations of Imperfections in Crystals, Interscience 1972, p. 135.Google Scholar
  5. (5).
    J. Bardolle, J. Chem. Phys. 1956, 53, 639.Google Scholar

Copyright information

© Springer Science+Business Media New York 1977

Authors and Affiliations

  • A. M. Brown
    • 1
  • P. L. Surman
    • 1
  1. 1.Surface Chemistry SectionCentral Electricity Research LaboratoriesLeatherheadEngland

Personalised recommendations