High-temperature oxidation of nickel-based alloys and estimation of the adhesion strength of resulting oxide layers

The kinetics of isothermal oxidation (1100°C) of commercial nickel-based alloys with different content of sulfur (0.22–3.2 wt ppm) is studied. The adhesion strength in a metal/oxide system is estimated as a function of sulfur content and duration of high-temperature exposure. The scratch-test techni...

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Bibliographic Details
Published in:Protection of metals and physical chemistry of surfaces 2011-05, Vol.47 (3), p.347-353
Main Authors: Fedorova, E. N., Monceau, D., Oquab, D., Khudonogov, S. A.
Format: Article
Language:English
Subjects:
Adhesive strength
Characterization and Evaluation of Materials
Chemical Sciences
Chemistry and Materials Science
Corrosion and Coatings
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Material chemistry
Materials and Coatings
Materials Science
Metallic Materials
New Substances
Nickel base alloys
Oxidation
Oxide coatings
Oxides
Strength
Sulfur
Titanium dioxide
Tribology
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Summary:The kinetics of isothermal oxidation (1100°C) of commercial nickel-based alloys with different content of sulfur (0.22–3.2 wt ppm) is studied. The adhesion strength in a metal/oxide system is estimated as a function of sulfur content and duration of high-temperature exposure. The scratch-test technique is proposed to quantitatively estimate the work of adhesion of resulting oxide films. It is found that the film microstructure is composed of an inner α-Al 2 O 3 layer and an outer NiAl 2 O 4 spinel layer, which are separated by discrete inclusions of TiO 2 . Residual stresses in the oxide film are experimentally determined by X-ray diffraction.
ISSN:2070-2051
2070-206X
DOI:10.1134/S2070205111030051