Oxide transformations during sintering of in situ oxidised FeAl powders

  • Wolski K
  • Thévenot F
  • Le Coze J
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Abstract

Powder metallurgy has been used to prepare FeAl powders with in situ created oxidation products. The aim of this study was to analyse the types of oxide formed as a function of sintering conditions. Highly oxidised powders have been used to give evidence of these transformations by X-ray diffraction. It has been shown that low temperature sintering (T < 1200°C) results in the formation of FeAl2O4spinel, while higher sintering temperatures lead to its transformation into α-Al2O3and coarsening. An attempt, based on thermodynamic calculations, has been made to explain the formation of FeAl2O4spinel.

Author-supplied keywords

  • FeAl powders
  • Intermetallics
  • Internal oxidation
  • Mechanical alloying
  • Oxide dispersion
  • Oxide transformation

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Authors

  • K. Wolski

  • F. Thévenot

  • J. Le Coze

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