心血管生物吸收装置用铸态Zn-xCu-Sr合金的力学性能和生物腐蚀行为

IF 1.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Engineering, Science and Technology Pub Date : 2022-09-30 DOI:10.1080/1478422X.2022.2118438

H. Yushu, Shen Qiaosheng, Zhang Henghua

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引用次数: 1

摘要

本研究对铸态Zn-xCu-0.1Sr (x = 1、2和3wt%)合金的力学和生物腐蚀行为进行了研究。研究了Zn-xCu-0.1Sr合金的显微组织、力学性能和体外降解性能。结果表明:随着Cu含量从1.0 wt%增加到3.0wt%， CuZn5相数量增加，CuZn5相的平均晶粒尺寸从6.96 μm增加到10.92 μm;当Cu添加量为2wt%时，合金的力学性能最佳，抗拉强度为129.4 MPa，屈服强度为108.4 MPa。此外，Cu含量越高的合金在浸泡后的腐蚀速率越快。Zn-xCu-0.1Sr合金均表现出适宜的体外降解速率，降解模式基本一致。Zn-2Cu-0.1Sr合金所表现出的强度、延展性和生物腐蚀性能使其成为心血管支架应用的有希望的候选者。

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Mechanical properties and biocorrosion behaviour of as-cast Zn-xCu-Sr alloys for cardiovascular bioabsorbable devices

ABSTRACT In this study, the mechanical and biocorrosion behavior of as-cast Zn-xCu-0.1Sr (x = 1, 2, and 3wt%) alloys for potential application was studied. The microstructure, mechanical properties, and in vitro degradation of Zn-xCu-0.1Sr alloys were investigated. The results show that as Cu content increased from 1.0 to 3.0wt%, the number of CuZn5 phases increased and the average grain size of CuZn5 phases increased from 6.96 μm to 10.92 μm. The 2wt% addition of Cu resulted in the best mechanical properties with 129.4 MPa in ultimate tensile strength and 108.4 MPa in yield strength. Furthermore, the higher corrosion rate was experienced in the alloys with higher Cu content after immersion. Zn-xCu-0.1Sr alloys all presented appropriate in vitro degradation rates in a basically uniform degradation mode. The strength, ductility and biocorrosion property exhibited by the Zn-2Cu-0.1Sr alloy compositions make it a promising candidate for cardiovascular stent applications.

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来源期刊

Corrosion Engineering, Science and Technology 工程技术-材料科学：综合

CiteScore

3.20

自引率

5.60%

发文量

审稿时长

3.4 months

期刊介绍： Corrosion Engineering, Science and Technology provides broad international coverage of research and practice in corrosion processes and corrosion control. Peer-reviewed contributions address all aspects of corrosion engineering and corrosion science; there is strong emphasis on effective design and materials selection to combat corrosion and the journal carries failure case studies to further knowledge in these areas.