Porous Ti with low modulus,excellent bio-corrosion resistance,biocompatibility,and antibacterial activity is highly pursued as advanced implant materials.In this work,a new approach to prepare micron porous structures on the surface layer of a grade 2 commercially-pure Ti(TA2)was proposed,which utilized a simple vacuum wetting process of pure Ag on the surface of TA2.The microstructure,corrosion resis-tance,biocompatibility,mechanical properties,antibacterial ability,and formation mechanism of the as-fabricated porous Ti were studied.The results show that the pores(with average pore sizes of 0.5-5 μm)are distributed on the surface layer of the TA2 with a depth of～10 μm.In particular,a large number of silver nanoparticles(AgNPs)form which are dispersed on the porous structures.The formation mecha-nisms of the porous structures and AgNPs were elucidated,suggesting that the volatilization/sublimation of Ag in TA2 is crucial.The porous Ti possesses excellent bio-corrosion resistance,surface wettability,biocompatibility,antibacterial activity,and a relatively low elastic modulus of 40-55 GPa,which may have a promising future in the field of orthopedic implants.This work also provides a novel idea for the development of advanced porous Ti materials for orthopedic-related basic research and biomedical applications.

Guanpeng Liu;Yulong Li;Ming Yan;Jicai Feng;Jian Cao;Min Lei;Quanwen Liu;Xiaowu Hu;Wenqin Wang;Xuewen Li

Key Lab for Robot and Welding Automation ofJJiangxi Province,Mechanical and Electrical Engineering School,Nanchang University,Nanchang 330031,China;Jiangxi Provincial Key Laboratory of Interdisciplinary Science,Nanchang University,Nanchang 330031,China;Department of Materials Science and Engineering and Shenzhen Key Laboratory for Additive Manufacturing of High-Performance Materials,Southern University of Science and Technology,Shenzhen 518055,China;State Key Lab of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China;The National Engineering Research Center for Bioengineering Drugs and the Technologies,Institute of Translational Medicine,Nanchang University,Nanchang 330031,China;The Engineering Training Center of Nanchang University,Mechanical and Electrical Engineering School,Nanchang University.Nanchang 330031,China

材料科学技术（英文版）

[1]Guanpeng Liu;Yulong Li;Ming Yan;Jicai Feng;Jian Cao;Min Lei;Quanwen Liu;Xiaowu Hu;Wenqin Wang;Xuewen Li-.Vacuum wetting of Ag/TA2 to develop a novel micron porous Ti with significant biocompatibility and antibacterial activity)[J].材料科学技术（英文版）,2022(21):180-191

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