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Coatings 2017, 7(10), 156; https://doi.org/10.3390/coatings7100156

Microstructure, Mechanical and Corrosion Behaviors of CoCrFeNiAl0.3 High Entropy Alloy (HEA) Films

1
Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong
2
Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518057, China
3
College of Physics and Energy, Shenzhen University, Shenzhen 518060, China
*
Author to whom correspondence should be addressed.
Received: 30 July 2017 / Revised: 14 September 2017 / Accepted: 22 September 2017 / Published: 26 September 2017
(This article belongs to the Special Issue High Entropy Alloy Coatings)
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Abstract

The HEA-CoCrFeNiAl0.3 thin film in this study has been successfully developed by radio frequency (RF) magnetron sputtering to meet the increasing demand in engineering applications. Its microstructure and surface profile were investigated accordingly. The as-synthesized HEA film was found to have a homogeneous element distribution and ultra-smooth surface, exhibiting a typical face-centered cubic (FCC) solid solution. The film showed better mechanical properties than its bulk counterpart, with a Young’s modulus and hardness of ~201.4 GPa and ~11.5 GPa, respectively. Furthermore, corrosion tests demonstrated decreased sensitivity to localized corrosion in comparison to the commercial 304 stainless steel in NaCl solution. View Full-Text
Keywords: high entropy alloy; coating; sputtering; mechanical behavior; corrosion resistance high entropy alloy; coating; sputtering; mechanical behavior; corrosion resistance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Gao, L.; Liao, W.; Zhang, H.; Surjadi, J.U.; Sun, D.; Lu, Y. Microstructure, Mechanical and Corrosion Behaviors of CoCrFeNiAl0.3 High Entropy Alloy (HEA) Films. Coatings 2017, 7, 156.

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