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

Coatings

Libo Gao¹  James Utama Surjadi¹  Weibing Liao¹  Yang Lu¹  Dong Sun¹  Hongti Zhang¹ 

[1] Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong;

关键词: high entropy alloy;    coating;    sputtering;    mechanical behavior;    corrosion resistance;   

DOI  :  10.3390/coatings7100156

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown