INFLUENCE OF SUBSTRATE TEMPERATURE ON THE MICROSTRUCTURE AND PROPERTIES OF CoCrFeNiNbx HIGH ENTROPY ALLOY COATINGS

Xuehui Hao, Jingru Chen (), Xuefeng Zou (), Yaqi Guo (), Zhihao Li () and Changzheng Wang ()
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Xuehui Hao: School of Materials Science and Engineering, Liaocheng University, 252059 Liaocheng, P. R. China
Jingru Chen: School of Materials Science and Engineering, Liaocheng University, 252059 Liaocheng, P. R. China
Xuefeng Zou: School of Materials Science and Engineering, Liaocheng University, 252059 Liaocheng, P. R. China
Yaqi Guo: School of Materials Science and Engineering, Liaocheng University, 252059 Liaocheng, P. R. China
Zhihao Li: School of Materials Science and Engineering, Liaocheng University, 252059 Liaocheng, P. R. China
Changzheng Wang: School of Materials Science and Engineering, Liaocheng University, 252059 Liaocheng, P. R. China

Surface Review and Letters (SRL), 2025, vol. 32, issue 09, 1-10

Abstract: This work studies the effect of the substrate temperature on the microstructure and properties of CoCrFeNiNbx high entropy alloy (HEA) coatings fabricated by magnetron sputtering. The results indicate that all three CoCrFeNiNbx HEA coatings were composed of a simple FCC solid solution with a columnar structure. As the substrate temperature increased, Nb content in the FCC matrix increased while the grain size first decreased and then increased. Accordingly, CoCrFeNiNbx HEA coatings exhibited an increasing micro-hardness and a decreasing fracture toughness with the increasing substrate temperature. Moreover, CoCrFeNiNbx HEA coating deposited at 200∘ had better corrosion performance, which was due to its better surface quality and denser columnar structure compared to the other two coatings.

Keywords: High entropy alloy coatings; substrate temperature; microstructure; properties (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1142/S0218625X24501257

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