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 supe-rior antibacterial properties without intricate or rigorous annealing processes,which outperform the an-tibacterial 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 an-tibacterial copper-bearing stainless steel only performed the 71.50％and 80.84％antibacterial rate,respec-tively.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 al-loys.

Guangyu Ren;Lili Huang;Kunling Hu;Tianxin Li;Yiping Lu;Dongxu Qiao;Haitao Zhang;Dake Xu;Tongmin Wang;Tingju Li;Peter K.Liaw

Engineering Research Center of High Entropy Alloy Materials(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China;College of Food Science and Engineering,Ocean University of China,Qingdao 266100,China;Shenyang National Laboratory for Materials Science,Northeastern University,Shenyang 110819,China;Department of Materials Science and Engineering,The University of Tennessee,Knoxville,TN 37996,United States

材料科学技术（英文版）

[1]Guangyu Ren;Lili Huang;Kunling Hu;Tianxin Li;Yiping Lu;Dongxu Qiao;Haitao Zhang;Dake Xu;Tongmin Wang;Tingju Li;Peter K.Liaw-.Enhanced antibacterial behavior of a novel Cu-bearing high-entropy alloy)[J].材料科学技术（英文版）,2022(22):158-166

4FeCr0,9Cu0,tibacterial

Enhanced,antibacterial,behavior,novel,bearing,high,entropy,Contact,infection,viruses,been,critical,threat,human,health,worldwide,outbreak,put,forward,urgent,requirements,research,development,self,materials,especially,alloys,Based,concept,work,designed,prepared,Co0,supe,rior,properties,without,intricate,rigorous,annealing,processes,which,outperform,stainless,steels,tests,presented,against,Escherichia,coli,Staphylococcus,aureus,after,In,contrast,classic,copper,only,performed,respec,tively,results,reactive,oxygen,species,analysis,indicated,that,release,immediate,contact,phase,had,synergistic,effect,enhancing,Moreover,this,exhibited,excellent,corrosion,resistance,when,compared,compression,yield,strength,was,These,findings,generate,fresh,insights,into,guiding,designs,structure,function,integrated

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