In vitro corrosion properties of HTHEed Mg-Zn-Y-Nd alloy microtubes for stent applications:Influence of second phase particles and crystal orientation

作     者：Peihua Du Di Mei Tsuyoshi Furushima Shijie Zhu Liguo Wang Yifan Zhou Shaokang Guan 

作者机构：School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Henan Key Laboratory of Advanced magnesium AlloysZhengzhou 450002China Key Laboratory of Advanced Materials Processing and Mold Ministry of EducationZhengzhou 450002China Department of Mechanical and Biofunctional SystemsInstitute of Industrial ScienceThe University of Tokyo4-6-1KomabaMeguroTokyo 153-8505Japan Magnesium Innovation Centre-MagICInstitute of Materials ResearchHelmholtz-Zentrum GeesthachtGeesthacht 21502Germany 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2022年第10卷第5期

页      面：1286-1295页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financial support of Key Projects of the Joint Fund of the National Natural Science Foundation of China(Grant No:U1804251) the National Key Research and Development Program of China(2016YFC1102403,2018YFC1106703 and 2017YFB0702504) China Scholarship Council for the award of fellowship and funding(No.201707040058) China Scholarship Council for the award of fellowship and funding(No.201607040051) 

主　　题：Mg-Zn-Y-Nd alloy Microtubes Heat treatment Hot extrusion Corrosion properties Cardiovascular stent 

摘      要：Magnesium(Mg)alloys are promising materials for cardiovascular stent applications due to their good biocompatibility and ***,in vitro and in vivo corrosion tests reveal that Mg alloy stents suffer from a rapid corrosion rate and severe localized corrosion,which is limiting their widespread *** solve the problem of uneven degradation of stents,a HTHE(long-time and high-temperature heat treatment,large-reduction-ratio hot extrusion)process is used to manufacture Mg-Zn-Y-Nd alloy microtubes in this *** heat treatment is to dissolve alloying elements and reduce the size of SPPs,and the hot extrusion is to acquire fine-grained and strongly textured *** microstructural characterization shows that coarse second phases in as-cast alloy are refined and uniformly distributed in matrix of *** hot extrusion,microtubes show strong texture with basal plain oriented parallel to the longitudinal section(LS).The corrosion testing indicates that severe localized corrosion occurs on the cross section(CS)while localized corrosion is alleviated on the *** on the different corrosion properties of the LS and CS,HTHEed microtubes are promising for solving the problems of rapid corrosion rate and severe localized corrosion of Mg alloy stents.