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The Effect of Nitrogen on the Oxidation of TiAl

Published online by Cambridge University Press:  22 February 2011

Franz Dettenwanger ,
E. Schumann ,
M. RÜhle ,
J. Rakowski  and
G. H. Meier
Franz Dettenwanger
Affiliation:
MPI für Metallforschung, Institut für Werkstoffwissenschaft, Seestraße 92, D-70174 Stuttgart, Germany
E. Schumann
Affiliation:
MPI für Metallforschung, Institut für Werkstoffwissenschaft, Seestraße 92, D-70174 Stuttgart, Germany
M. RÜhle
Affiliation:
MPI für Metallforschung, Institut für Werkstoffwissenschaft, Seestraße 92, D-70174 Stuttgart, Germany
J. Rakowski
Affiliation:
Department of Materials Science and Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
G. H. Meier
Affiliation:
Department of Materials Science and Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
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Abstract

Ti-50(at.%)Al samples were oxidized at 900°C in air for 1 hour and studied by electron microscopy. The application of electron spectroscopic imaging with energy filtered TEM permitted the imaging of the distribution of the relevant elements (Ti, Al, O, N) within the oxide scale. With this method the formation of TiN in the inner part of the scale could be shown. The oxidation in air lead to an alternating scale containing TiN and alumina near the metal/scale interface. The formation of an aluminum-depleted second metallic phase in the metal beneath the oxide scale was observed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 981
Copyright
Copyright © Materials Research Society 1995

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