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Oxidation behaviour of a PM β-NiAl material in air at 1200°C < T < 1400°C

Published online by Cambridge University Press:  25 October 2002

B. Heusler-Sourkounis ,
M. Göbel ,
G. Borchardt ,
R. Baccino  and
B. Lesage
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Abstract

The oxidation behaviour of a β-NiAl material (produced by powder metallurgy) was investigated in the temperature range 1200°C < T < 1400°C. In isothermal runs at 1200 and 1400°C, an alumina scale grew according to a parabolic growth law. At 1300°C, catastrophic oxidation was observed, but a short anneal at low oxygen partial pressure at 1200°C, prior to the oxidation at 1300°C, initiated a parabolic scale growth. Further, cyclic oxidation tests were carried out and the growth mechanism of the scale was identified by two-stage oxidation (16O2/18O2) in combination with SNMS isotope profile analysis.

Type
Research Article
Information
Metallurgical Research & Technology , Volume 98 , Issue 2: Tribologie de la mise en forme des métaux , February 2001 , pp. 193 - 199
Copyright
© La Revue de Métallurgie, 2001

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