Oxidation resistance and hardness of high entropy alloy composite coating Al₇₀(Cr-Fe-Ni)_(30-X)(SiC)_X prepared on AISI 1018 substrate by mechanical alloying

ABSTRACT

We successfully coated low carbon steel with high entropy alloy (HEA) composite coating Al70(Cr-Fe-Ni)(30-x)(SiC)x to increase its oxidation resistance. The coating was applied using mechanical alloying (MA), and the phase and microstructure, including hardness, were characterised thoroughly. All samples covered the substrate with a thickness of the coating layer ranging from 103.637 ± 10.5 to 222.751 ± 8.5 μm. The sample with 10 at.% of SiC gave optimal results with a better coating layer thickness, fewer nodules formed, the lowest weight gain value, the best oxidation rate constant, and the ability to produce a larger thickness of Al₂O₃.

KEYWORDS:

• High entropy alloy
• mechanical alloying
• coating
• oxidation

Acknowledgments

This research was financially supported by the Ministry of Education, Culture, Research, and Technology, Indonesia, under scheme of National Competitive Basic Research, Grant No. 073/E5/PG.02.00.PL/2023, No. 1159/LL3/AL.04/2023, No. 01-1-4/463/SPK/V/2023. The authors are grateful to the Nano Center Indonesia and Research Center for Advanced Materials - BRIN for providing the research facilities.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

The data that support the findings of this study are available from the corresponding author, [A.N.], upon reasonable request.

Additional information

Funding

The work was supported by the Kementerian Pendidikan, Kebudayaan, Riset, dan Teknologi [073/E5/PG.02.00.PL/2023]; Lembaga Layanan Dikti [1159/LL3/AL.04/2023]; Universitas Mercu Buana [No. 01-1-4/463/SPK/V/2023].