Journal
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
Volume 117, Issue -, Pages 158-166Publisher
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2022.02.001
Keywords
High-entropy alloy; Antibacterial property; Corrosion resistance; Mechanical property
Funding
- National Key Research and Development Program of China [2019YFA0209901]
- National Natural Science Foundation of China [51822402, U20A20278]
- Liao Ning Revitalization Talents Program [XLYC1807047]
- Major Special Project of Scientific and Technological Innovation 2025 in Ningbo [2019B10086]
- National Science Foundation [DMR-1611180, 1809640]
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A novel antibacterial high-entropy alloy with superior antibacterial properties and corrosion resistance was designed and prepared. The alloy exhibited higher antibacterial rates and yield strength compared to classic antibacterial stainless steels.
Contact infection of bacteria and viruses has been a critical threat to human health. The worldwide outbreak of COVID-19 put forward urgent requirements for the research and development of the self-antibacterial materials, especially the antibacterial alloys. Based on the concept of high-entropy alloys, the present work designed and prepared a novel Co0.4FeCr0.9Cu0.3 antibacterial high-entropy alloy with superior antibacterial properties without intricate or rigorous annealing processes, which outperform the antibacterial stainless steels. The antibacterial tests presented a 99.97% antibacterial rate against Escherichia coli and a 99.96% antibacterial rate against Staphylococcus aureus after 24 h. In contrast, the classic antibacterial copper-bearing stainless steel only performed the 71.50% and 80.84% antibacterial rate, respectively. The results of the reactive oxygen species analysis indicated that the copper ion release and the immediate contact with copper-rich phase had a synergistic effect in enhancing antibacterial properties. Moreover, this alloy exhibited excellent corrosion resistance when compared with the classic antibacterial stainless steels, and the compression test indicated the yield strength of the alloy was 1015 MPa. These findings generate fresh insights into guiding the designs of structure-function-integrated antibacterial alloys. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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