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Oxidation resistance of AlCoFeNiCux high entropy alloys

Authors :
Marián Palcut
Marián Drienovský
Pavol Priputen
Patrik Šulhánek
Peter Stacho
Žaneta Gerhátová
Peter Gogola
Jozef Krajčovič
Lucia Bónová
Martin Kusý
Source :
Journal of Materials Research and Technology, Vol 31, Iss , Pp 1974-1990 (2024)
Publication Year :
2024
Publisher :
Elsevier, 2024.

Abstract

The oxidation behavior of as-cast AlCoFeNiCux (x = 0.6–3.0) high entropy alloys was studied by isothermal annealing in flowing synthetic air at 1000 °C. A formation of an external protective Al2O3 scale has been found. The oxidation kinetics followed a parabolic rate law. The rate constants were increasing with increasing Cu concentration in the alloys. A scale spallation on the alloys with higher Cu concentration was observed. The spallation facilitated a penetration of oxygen through the scale and promoted the formation of CuO and CuAl2O4. The oxidation mechanism of the AlCoFeNiCux alloys is discussed and compared with previously studied high entropy alloys.

Details

Language :
English
ISSN :
22387854
Volume :
31
Issue :
1974-1990
Database :
Directory of Open Access Journals
Journal :
Journal of Materials Research and Technology
Publication Type :
Academic Journal
Accession number :
edsdoj.113d943c197b441e826e33c358f71740
Document Type :
article
Full Text :
https://doi.org/10.1016/j.jmrt.2024.06.185