Oxidation resistance of AlCoFeNiCux high entropy alloys

Marián Palcut; Marián Drienovský; Pavol Priputen; Patrik Šulhánek; Peter Stacho; Žaneta Gerhátová; Peter Gogola; Jozef Krajčovič; Lucia Bónová; Martin Kusý

Journal of Materials Research and Technology (Jul 2024)

Oxidation resistance of AlCoFeNiCux high entropy alloys

Marián Palcut,
Marián Drienovský,
Pavol Priputen,
Patrik Šulhánek,
Peter Stacho,
Žaneta Gerhátová,
Peter Gogola,
Jozef Krajčovič,
Lucia Bónová,
Martin Kusý

Affiliations

Marián Palcut: Slovak University of Technology, Faculty of Materials Science and Technology, Institute of Materials Science, Jána Bottu 25, 91724, Trnava, Slovakia; Corresponding author.
Marián Drienovský: Slovak University of Technology, Faculty of Materials Science and Technology, Institute of Materials Science, Jána Bottu 25, 91724, Trnava, Slovakia
Pavol Priputen: Slovak University of Technology, Faculty of Materials Science and Technology, Institute of Materials Science, Jána Bottu 25, 91724, Trnava, Slovakia; Slovak University of Technology, Faculty of Materials Science and Technology, Advanced Technologies Research Institute (ATRI), Jána Bottu 25, 91724, Trnava, Slovakia
Patrik Šulhánek: Slovak University of Technology, Faculty of Materials Science and Technology, Institute of Materials Science, Jána Bottu 25, 91724, Trnava, Slovakia
Peter Stacho: Slovak University of Technology, Faculty of Materials Science and Technology, Institute of Materials Science, Jána Bottu 25, 91724, Trnava, Slovakia
Žaneta Gerhátová: Slovak University of Technology, Faculty of Materials Science and Technology, Institute of Materials Science, Jána Bottu 25, 91724, Trnava, Slovakia
Peter Gogola: Slovak University of Technology, Faculty of Materials Science and Technology, Institute of Materials Science, Jána Bottu 25, 91724, Trnava, Slovakia
Jozef Krajčovič: Slovak University of Technology, Faculty of Materials Science and Technology, Institute of Materials Science, Jána Bottu 25, 91724, Trnava, Slovakia
Lucia Bónová: Slovak University of Technology, Faculty of Materials Science and Technology, Advanced Technologies Research Institute (ATRI), Jána Bottu 25, 91724, Trnava, Slovakia
Martin Kusý: Slovak University of Technology, Faculty of Materials Science and Technology, Institute of Materials Science, Jána Bottu 25, 91724, Trnava, Slovakia

Journal volume & issue: Vol. 31
pp. 1974 – 1990

Abstract

Read online

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.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

About the journal

Abstract

Keywords