The development of medium-entropy alloys(MEAs)with superior mechanical properties and remarkable antibacterial performance has garnered significant attention in the field of metallic biomaterials.In this study,Ti-18Zr...The development of medium-entropy alloys(MEAs)with superior mechanical properties and remarkable antibacterial performance has garnered significant attention in the field of metallic biomaterials.In this study,Ti-18Zr-8Mo-10Cu MEAs with varying properties,including mechanical properties,corrosion resistance,antibacterial performance,and cytocompatibility,were obtained through heat treatment at 900℃for 1 h,followed by various cooling methods(water cooling,air cooling,and furnace cooling).An increasing cooling rate results in a decrease in the elastic modulus.The water-cooling specimen exhibits optimal ductility over 40%and minimum elastic modulus of 60 GPa.Moreover,the reduction in alloy composition segregation after heat treatment enhances the anticorrosion properties,exhibiting a robust passivation capability of MEAs.All synthesized Ti-18Zr-8Mo-10Cu ME As show favorable cytocompatibility and robust antibacterial rate approaching~100%at 12 and 24 h.Generally,the water-cooling specimen shows exceptional mechanical properties and outstanding antibacterial performance,holding considerable promise for future orthopedic applications.This study offers a viable approach to optimizing the comprehensive properties of copper-bearing Ti MEAs for biomedical applications.展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.52231005 and 52001324)the Start-up Research Fund of Southeast University(No.RF1028623113)+1 种基金the Laboratory of Advanced Metallic Materials,Southeast University(Nos.AMM2025A01,AMM2024A02,and AMM2023B05)the Natural Science Foundation of Henan Province(No.252300421541)
文摘The development of medium-entropy alloys(MEAs)with superior mechanical properties and remarkable antibacterial performance has garnered significant attention in the field of metallic biomaterials.In this study,Ti-18Zr-8Mo-10Cu MEAs with varying properties,including mechanical properties,corrosion resistance,antibacterial performance,and cytocompatibility,were obtained through heat treatment at 900℃for 1 h,followed by various cooling methods(water cooling,air cooling,and furnace cooling).An increasing cooling rate results in a decrease in the elastic modulus.The water-cooling specimen exhibits optimal ductility over 40%and minimum elastic modulus of 60 GPa.Moreover,the reduction in alloy composition segregation after heat treatment enhances the anticorrosion properties,exhibiting a robust passivation capability of MEAs.All synthesized Ti-18Zr-8Mo-10Cu ME As show favorable cytocompatibility and robust antibacterial rate approaching~100%at 12 and 24 h.Generally,the water-cooling specimen shows exceptional mechanical properties and outstanding antibacterial performance,holding considerable promise for future orthopedic applications.This study offers a viable approach to optimizing the comprehensive properties of copper-bearing Ti MEAs for biomedical applications.
