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

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

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...

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Veröffentlicht in:Coatings (Basel) 2017-09, Vol.7 (10), p.156
Hauptverfasser: Gao, Libo, Liao, Weibing, Zhang, Hongti, Surjadi, James, Sun, Dong, Lu, Yang
Format: Artikel
Sprache:eng
Schlagworte:
Austenitic stainless steels
Bulk modulus
Corrosion tests
Face centered cubic lattice
High entropy alloys
Localized corrosion
Magnetron sputtering
Mechanical properties
Microstructure
Modulus of elasticity
Radio frequency
Thin films
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Zusammenfassung: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.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings7100156