Preparation and Properties of Biodegradable Zn-3Cu-xMn Alloys

doi:10.12068/j.issn.1005-3026.2023.08.006

Abstract

Abstract: To investigate the feasibility of Zn alloy as biodegradable cardiovascular stent material， Zn-3Cu-xMn(x=0， 0.5%， 1.0%，1.5%)alloy was prepared by casting and reverse hot extrusion. The effects of Mn content on the microstructure and properties of the alloys were studied by optical metallographic microscope， XRD， SEM， tensile test， electrochemical test and SBF solution immersion corrosion. The results showed that the microstructure of Zn-3Cu-xMn alloy is composed of Zn matrix， CuZn₅ and MnZn₁₃. With the increase of Mn content in the alloy， the tensile strength increases， and the yield strength and elongation first increase and then decrease. Electrochemical tests and SBF solution immersion corrosion experiments indicated that the corrosion rate of Zn-3Cu-xMn alloy increases from 0.063mm/a to 0.113mm/a with the increase of Mn content in the alloy. The alloy with Mn element meets the mechanical properties of cardiovascular stent material， and the corrosion rate is higher than the requirements of cardiovascular stent material， so Zn alloy has the potential to become biodegradable cardiovascular stent material.

Key words: biodegradable cardiovascular stent material; Zn-3Cu-xMn alloy; microstructure; mechanical properties; corrosion rate

CLC Number:

TG146.2

ZHANG Ya-jing， WANG Jin-peng， CHEN Xin， WU Hang-yu. Preparation and Properties of Biodegradable Zn-3Cu-xMn Alloys[J]. Journal of Northeastern University(Natural Science), 2023, 44(8): 1104-1110.

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