Creep properties of biodegradable Zn-0.1Li alloy at human body temperature: implications for its durability as stents

Creep properties of biodegradable Zn-0.1Li alloy at human body temperature: implications for its durability as stents

This is the first report on creep properties of biodegradable zinc alloys at human body temperature. The extruded Zn-0.1Li (wt.%) alloy exhibits appreciable creep deformation at 37°C under stresses ranging 80–230 MPa within 500 h. The creep deformation at low stresses (80–155 MPa, about 0.4–0.8 yiel...

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Bibliographic Details
Main Authors: Suming Zhu, Chengcheng Wu, Guannan Li, Yufeng Zheng, Jian-Feng Nie
Format: Article
Language:English
Published: Taylor & Francis Group 2019-09-01
Series:Materials Research Letters
Subjects:
Biodegradable zinc alloys
creep properties
stress exponent
activation energy
Online Access:http://dx.doi.org/10.1080/21663831.2019.1610106
Description
Summary:This is the first report on creep properties of biodegradable zinc alloys at human body temperature. The extruded Zn-0.1Li (wt.%) alloy exhibits appreciable creep deformation at 37°C under stresses ranging 80–230 MPa within 500 h. The creep deformation at low stresses (80–155 MPa, about 0.4–0.8 yield strength) is characterized by a stress exponent of about 4 and an activation energy close to that for self-diffusion of zinc, which are typical of dislocation creep. The implications of creep at human body temperature for durability of biodegradable zinc alloys as stents are discussed.
ISSN:2166-3831

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