Third element effect in the surface zone of Fe-Cr-Al alloys

E. Airiskallio, E. Nurmi, M. H. Heinonen, I. J. Väyrynen, K. Kokko, M. Ropo, M. P.J. Punkkinen, H. Pitkänen, M. Alatalo, J. Kollár, B. Johansson, L. Vitos

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Abstract

The third element effect to improve the high temperature corrosion resistance of the low-Al Fe-Cr-Al alloys is suggested to involve a mechanism that boosts the recovering of the Al concentration to the required level in the Al-depleted zone beneath the oxide layer. We propose that the key factor in this mechanism is the coexistent Cr depletion that helps to maintain a sufficient Al content in the depleted zone. Several previous experiments related to our study support that conditions for such a mechanism to be functional prevail in real oxidation processes of Fe-Cr-Al alloys.

Original languageEnglish
Article number033105
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number3
DOIs
Publication statusPublished - Jan 27 2010

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Airiskallio, E., Nurmi, E., Heinonen, M. H., Väyrynen, I. J., Kokko, K., Ropo, M., Punkkinen, M. P. J., Pitkänen, H., Alatalo, M., Kollár, J., Johansson, B., & Vitos, L. (2010). Third element effect in the surface zone of Fe-Cr-Al alloys. Physical Review B - Condensed Matter and Materials Physics, 81(3), [033105]. https://doi.org/10.1103/PhysRevB.81.033105