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Microstructure and Thermo-Mechanical Behavior of NiAl Coatings

Published online by Cambridge University Press:  26 February 2011

G. Dehm ,
J. Riethmüller ,
P. Wellner ,
O. Kraft ,
H. Clemens  and
E. Arzt
G. Dehm
Affiliation:
Max-Planck-Institut für Metallforschung, 70569 Stuttgart, Germany
J. Riethmüller
Affiliation:
Max-Planck-Institut für Metallforschung, 70569 Stuttgart, Germany
P. Wellner
Affiliation:
Max-Planck-Institut für Metallforschung, 70569 Stuttgart, Germany
O. Kraft
Affiliation:
Institut für Materialforschung II, Forschungszentrum Karlsruhe and Institut für Zuverlässigkeit von Bauteilen und Systemen, Universität Karlsruhe (TH), 76344 Karlsruhe, Germany
H. Clemens
Affiliation:
Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, 8700 Leoben, Austria
E. Arzt
Affiliation:
Max-Planck-Institut für Metallforschung, 70569 Stuttgart, Germany
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Abstract

In this study the thermo-mechanical behavior of a commercial Pt containing NiAl coating deposited on a Ni-base superalloy is compared with a Ni-rich NiAl coating sputter-deposited on a Si substrate. Both types of coatings possess high tensile room temperature stresses after thermal straining. The Pt-NiAl coating shows negligible plasticity as a result of solid solution and dispersion strengthening. In contrast, for the NiAl coatings on Si noticeable plasticity can be obtained if the film thickness exceeds the sub-micrometer range.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 842: Symposium S – Integrative and Interdisciplinary Aspects of Intermetallics , 2004 , S1.3
Copyright
Copyright © Materials Research Society 2005

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References

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