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材料科学技术（英文）, 2016, 32(9): 909-918.
10.1016/j.jmst.2016.06.003
In Vitro Evaluation of the Feasibility of Commercial Zn Alloys as Biodegradable Metals

Wang C. 1, , Yang H.T. 2, , Li X. 1,*,, , Zheng Y.F. 2,*,,

1. Department of Interventional Radiology and Vascular Surgery, Peking University Third Hospital, Beijing 100191, China;
2. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China

In this work, three widely used commercial Zn alloys (ZA4-1, ZA4-3, ZA6-1) were purchased and prepared by hot extrusion at 200?°C. The microstructure, mechanical properties, corrosion behaviors, biocompatibility and hemocompatibility of Zn alloys were studied with pure Zn as control. Commercial Zn alloys demonstrated increased strength and superb elongation compared with pure Zn. Accelerated corrosion rates and uniform corrosion morphologies were observed in terms of commercial Zn alloys due to galvanic effects between Zn matrix and α-Al phases. 100% extracts of ZA4-1 and ZA6-1 alloys showed mild cytotoxicity while 50% extracts of all samples displayed good biocompatibility. Retardant cell cycle and inhibited stress fibers expression were observed induced by high concentration of Zn2+ releasing during corrosion. The hemolysis ratios of Zn alloys were lower than 1% while the adhered platelets showed slightly activated morphologies. In general, commercial Zn alloys possess promising mechanical properties, appropriate corrosion rates, significantly improved biocompatibility and good hemocompatibility in comparison to pure Zn. It is feasible to develop biodegradable metals based on commercial Zn alloys.

引用： Wang C., Yang H.T., Li X., Zheng Y.F. In Vitro Evaluation of the Feasibility of Commercial Zn Alloys as Biodegradable Metals. 材料科学技术（英文）, 2016, 32(9): 909-918. doi: 10.1016/j.jmst.2016.06.003
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