Fresenius' Journal of Analytical Chemistry

, Volume 346, Issue 1–3, pp 75–78 | Cite as

Surface analytical investigations on the oxidation behaviour of TiAl-base intermetallics

  • U. Figge
  • A. Elschner
  • N. Zheng
  • H. Schuster
  • W. J. Quadakkers
Short Lectures
Received:

Summary

The oxidation behaviour of TiAl-base intermetallics has been investigated at 800°C in air. The main emphasis was placed on the mechanism by which niobium additions decrease the oxidation rate of titanium aluminides. For this purpose specimens of Ti50Al and Ti45Al10Nb were oxidized in a two-stage oxidation technique using an 18O-tracer. The scale formed during this oxidation process was analyzed by SNMS. It was found that niobium is mainly incorporated in the titanium dioxide and the nitride scale which forms beneath the initially formed alumina layer. The effect of this behaviour of the niobium on the oxide scale growth rates is discussed.

Keywords

Titanium Dioxide Nitride Niobium Oxidation Process 
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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • U. Figge
    • 1
  • A. Elschner
    • 1
    • 2
  • N. Zheng
    • 1
  • H. Schuster
    • 1
  • W. J. Quadakkers
    • 1
  1. 1.Institute for Reactor MaterialsResearch Centre JülichJülichGermany
  2. 2.Bayer AGUerdingen

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