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The Effect of Y and Zr on the Oxidation of NiA1

Published online by Cambridge University Press:  22 February 2011

Eckart Schumann ,
J. C. Yang ,
M. Rühle  and
M. J. Graham
Eckart Schumann
Affiliation:
Max-Planck-Institut für Metallforschung, Institut für Werkstoffwissenschaft, Seestr. 92, D–70174 Stuttgart, Germany
J. C. Yang
Affiliation:
Max-Planck-Institut für Metallforschung, Institut für Werkstoffwissenschaft, Seestr. 92, D–70174 Stuttgart, Germany
M. Rühle
Affiliation:
Max-Planck-Institut für Metallforschung, Institut für Werkstoffwissenschaft, Seestr. 92, D–70174 Stuttgart, Germany
M. J. Graham
Affiliation:
Institute for Microstructural Sciences, National Research Council of Canada, Ottawa, Ontario, K1A 0R6, Canada
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Abstract

The effect of Y and Zr on the oxidation behaviour of NiAl has been investigated using high resolution SIMS and analytical TEM. 18O tracer experiments in conjunction with SIMS showed that Y and Zr reduce the outward transport of cations during the growth of the AI2O3 scale. Complementary STEM-EDS measurements revealed segregation of Y and Zr at the metal/oxide interface as well as the grain boundaries in the AI2O3 scale. The amounts of segregation at both the interface and grain boundary were calculated to be less than one monolayer.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 1291
Copyright
Copyright © Materials Research Society 1995

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