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Journal of Materials Science

, Volume 26, Issue 7, pp 1899–1902 | Cite as

Surface oxidation of ferrochromium thin films

  • S. Veena Kumari
  • V. K. Vaidyan
  • K. G. Sathyanarayana
Papers

Abstract

Oxidation kinetics of ferrochromium (Cr 72 wt%, Fe 28 wt%) films of different thicknesses were followed at room temperature in the laboratory atmosphere by noting the conductivity of vacuum-deposited films as a function of time for a period of 150 minutes. A logarithmic oxidation growth with two different rate constants is obtained. X-ray diffraction analysis of 50 nm thick films at various temperatures indicated a solid solution of chromium and iron-chromium oxides. A decrease of lattice spacing observed with temperature increase is attributed to composition/structural changes near the metal-oxide interface. Microstructures of these film surfaces reveal the formation of bluish green crystals of Cr2O3 at 773 K.

Keywords

Microstructure Chromium Solid Solution Diffraction Analysis Film Surface 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman and Hall Ltd 1991

Authors and Affiliations

  • S. Veena Kumari
    • 1
  • V. K. Vaidyan
    • 1
  • K. G. Sathyanarayana
    • 2
  1. 1.Department of PhysicsUniversity of KeralaTrivandrumIndia
  2. 2.Regional Research Laboratory (CSIR)TrivandrumIndia

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