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材料科学技术（英文）, 2016, 32(9): 925-929.
10.1016/j.jmst.2016.08.008
Processing of a Novel Zn Alloy Micro-Tube for Biodegradable Vascular Stent Application

Wang Chang 1, , Yu Zhentao 1,*,, , Cui Yajun 1,2, , Zhang Yafeng 1, , Yu Sen 1, , Qu Gongqi 3, , Gong Haibo 3,

1. Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China;
2. Xi'an University of Architecture and Technology, Xi'an 710055, China;
3. Xi'an Advanced Medical Technology Co., Ltd., Xi'an 710077, China

In recent years, zinc based alloys as a new biodegradable metal material aroused intensive interests. However, the processing of Zn alloys micro-tubes (named slender-diameter and thin-walled tubes) is very difficult due to their HCP crystal structure and unfavorable mechanical properties. This study aimed to develop a novel technique to produce micro-tube of Zn alloy with good performance for biodegradable vascular stent application. In the present work, a processing method that combined drilling, cold rolling and optimized drawing was proposed to produce the novel Zn-5Mg-1Fe (wt%) alloy micro-tubes. The micro-tube with outer diameter of 2.5?mm and thickness of 130?μm was fabricated by this method and its dimension errors are within 10?μm. The micro-tube exhibits a fine and homogeneous microstructure, and the ultimate tensile strength and ductility are more than 220?MPa and 20% respectively. In addition, the micro-tube and stents of Zn alloy exhibit superior in vitro corrosion and expansion performance. It could be concluded that the novel Zn alloy micro-tube fabricated by above method might be a promising candidate material for biodegradable stent.

引用： Wang Chang, Yu Zhentao, Cui Yajun, Zhang Yafeng, Yu Sen, Qu Gongqi, Gong Haibo Processing of a Novel Zn Alloy Micro-Tube for Biodegradable Vascular Stent Application. 材料科学技术（英文）, 2016, 32(9): 925-929. doi: 10.1016/j.jmst.2016.08.008
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