Adsorption Characteristics of Praseodymium-Doped Aluminum Film

Optical constants n and k of a polycrystalline film of aluminum alloy and 2.54 at % praseodymium were measured at room temperature. Based on these data, optical-conductivity spectra were obtained for a clean and oxidized alloy surface. When analyzing the results of comparing these spectra with the m...

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Bibliographic Details
Published in:Protection of metals and physical chemistry of surfaces 2023-08, Vol.59 (4), p.563-569
Main Authors: Kiselev, A. I., Popov, N. A., Shevchenko, V. G.
Format: Article
Language:English
Subjects:
Adsorption
Aluminum base alloys
Characterization and Evaluation of Materials
Chemistry and Materials Science
Conduction bands
Corrosion and Coatings
Desorption
Electronic properties
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Metal films
Metallic Materials
Physicochemical Processes at the Interfaces
Praseodymium
Room temperature
Spectra
Surface chemistry
Tribology
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Summary:Optical constants n and k of a polycrystalline film of aluminum alloy and 2.54 at % praseodymium were measured at room temperature. Based on these data, optical-conductivity spectra were obtained for a clean and oxidized alloy surface. When analyzing the results of comparing these spectra with the model ones, the electronic characteristics of optical transitions, including the characteristics of surface states of electrons, were obtained. It is shown that the conduction band of an alloy with a clean surface is split to a minimum extent. The oxygen-adsorption heat values on the surface of an Al–2.54 at % Pr alloy film have been calculated. The equilibrium position of the adsorption–desorption processes of an alloy film at room temperature is significantly shifted towards desorption.
ISSN:2070-2051
2070-206X
DOI:10.1134/S2070205123700740