Oxidation of Metals

, Volume 42, Issue 3, pp 249–263

The effect of purity on the high-temperature oxidation of hafnium

  • V. B. Voitovich
  • V. A. Lavrenko
  • E. I. Golovko
  • V. M. Adejev
Article

DOI: 10.1007/BF01052026

Cite this article as:
Voitovich, V.B., Lavrenko, V.A., Golovko, E.I. et al. Oxid Met (1994) 42: 249. doi:10.1007/BF01052026

Abstract

The oxidation kinetics of hafnium of different purities were studied in the temperature range of 800–1200°C. This paper concerns the structure studies of the oxidized samples. TGA, XRD, SEM methods, and microhardness measurements were used. Hafnium oxidation follows the parabolic rate law, changing with time to the linear one. Oxidation-reaction products are HfO2(moncl) and α-solid solution of oxygen in hafnium. Anomalous oxidation behavior of hafnium having a high impurity content was found in the range 800–950°C. Activation energies for the parabolic and linear oxidation stages were calculated.

Key Words

kinetics scale oxidation hafnium purity 

Copyright information

© Plenum Publishing Corporation 1994

Authors and Affiliations

  • V. B. Voitovich
    • 1
  • V. A. Lavrenko
    • 1
  • E. I. Golovko
    • 1
  • V. M. Adejev
    • 1
  1. 1.The Institute for Problems of Materials ScienceUkrainian Academy of SciencesKievUkraine

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