Role of Al segregation and high affinity to oxygen in formation of adhesive alumina layers on FeCr alloy support

The aim of this study is to gain information necessary to propose the mechanism of the oxide layers’ formation on the FeCr alloy foil of 0.05 mm thickness as well as to obtain indications about thermal treatment resulting in the relatively uniform adhesive layers. The surface morphology of the oxide...

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Bibliographic Details
Published in:Catalysis today 2005-08, Vol.105 (3), p.629-633
Main Authors: Camra, J., Bielańska, E., Bernasik, A., Kowalski, K., Zimowska, M., Białas, A., Najbar, M.
Format: Article
Language:English
Subjects:
0.05 mm FeCr alloy foil
Catalysis
Chemistry
Exact sciences and technology
General and physical chemistry
Outward Al cation diffusion
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Y and Al high affinity to oxygen
Y and Al surface segregation
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Summary:The aim of this study is to gain information necessary to propose the mechanism of the oxide layers’ formation on the FeCr alloy foil of 0.05 mm thickness as well as to obtain indications about thermal treatment resulting in the relatively uniform adhesive layers. The surface morphology of the oxide layers formed on the foil in the course of its thermal treatment as well as layers’ thickness and element distribution along their cross sections were investigated with scanning electron microscopy and secondary ion mass spectrometry. Observed differences were ascribed to the various orientations of FeCr alloy crystallites.
ISSN:0920-5861
1873-4308
DOI:10.1016/j.cattod.2005.06.015