In vitro characterization of ZM21 mini-tube used for biodegradable metallic stent

Journal article (2018)

Authors

Dong Bian Peking University
Jingjun Jiang Peking University People’s Hospital
Weirui Zhou Peking University
Nan Li Peking University
Yufeng Zheng Peking University
M.A. Leeflang Biomaterials & Tissue Biomechanics - Mechanical, Maritime and Materials Engineering
J. Zhou Biomaterials & Tissue Biomechanics - Mechanical, Maritime and Materials Engineering
Research Group
Biomaterials & Tissue Biomechanics (Mechanical, Maritime and Materials Engineering) (TU Delft)
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Published Date

2018

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Biomechanical Engineering

Research Group

Biomaterials & Tissue Biomechanics

Abstract

Feasibility of a ZM21 mini-tube to be used as biodegradable stent applications was studied mainly focusing on its microstructure, mechanical property and corrosion behaviors. This mini-tube was composed of α-Mg, a small amount of Mn0.815Si0.185 and possibly some undissolved Mn. Compressive yield strength, ultimate compressive strength and compressive strain of this mini-tube were 86.5 ± 4.9 MPa, 347.7 ± 15.0 MPa and 10.9 ± 0.4%, respectively. It exhibited decent corrosion resistance in Hank's solution with a degradation rate of 0.26 mm/y. ZM21 mini-tube exhibited great potential to be used as biodegradable stents. But before that, localized corrosion should be well solved through impurity control and microstructure control.

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