The cellular structured titanium alloys have attracted significant attention for implants because of their lower Young's modulus,which is comparable to human bone and has the capability of providing space for bone tissue in-growth.However,there is a gap in the knowledge in regard to the relationship be-tween the pore characteristics and the electrochemical performance of open-cellular structured titanium alloys.In this study,we elucidate the influence of pore characteristics on the electrochemical performance of open-cellular structured Ti-6Al-4V alloys produced by electron beam melting(EBM).Intriguingly,the passive film formed on cellular structured Ti-6Al-4V alloy with a larger pore size was more stable and protective,and the corrosion performance was superior compared to the samples with a smaller pore size in phosphate buffered saline(PBS),mainly because of relatively smaller exposed surface area and unlimited flow of electrolyte.However,in acidic PBS containing fluoride ions,the pore characteristics did not play an important role in the corrosion resistance.It was considered that the protective film breaks down such that the corrosion performance of cellular structured alloys was comparable to each other in this harsh environment.

Xin Gai;Rui Liu;Yun Bai;Shujun Li;Yang Yang;Shenru Wang;Jianguo Zhang;Wentao Hou;Yulin Hao;Xing Zhang;Rui Yang;R.D.K.Misra

Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;Department of Orthopedic Surgery,Peking Union Medical College Hospital(PUMCH),Peking Union Medical College and Chinese Academy of Medical Sciences,Beijing 100730,China;Department of Metallurgical,Materials,and Biomedical Engineering,The University of Texas at El Paso,500W.University Avenue,El Paso,TX 79968,United States

材料科学技术（英文版）

[1]Xin Gai;Rui Liu;Yun Bai;Shujun Li;Yang Yang;Shenru Wang;Jianguo Zhang;Wentao Hou;Yulin Hao;Xing Zhang;Rui Yang;R.D.K.Misra-.Electrochemical behavior of open-cellular structured Ti-6Al-4V alloy fabricated by electron beam melting in simulated physiological fluid:the significance of pore characteristics)[J].材料科学技术（英文版）,2022(02):272-282

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