Mechanical properties, corrosion, and biocompatibility of Mg-Zr-Sr-Dy alloys for biodegradable implant applications

Ding, Y, Lin, J, Wen, C, Zhang, D and Li, Y 2018, 'Mechanical properties, corrosion, and biocompatibility of Mg-Zr-Sr-Dy alloys for biodegradable implant applications', Journal of Biomedical Materials Research Part B: Applied Biomaterials, vol. 106, no. 6, pp. 2425-2434.


Document type: Journal Article
Collection: Journal Articles

Title Mechanical properties, corrosion, and biocompatibility of Mg-Zr-Sr-Dy alloys for biodegradable implant applications
Author(s) Ding, Y
Lin, J
Wen, C
Zhang, D
Li, Y
Year 2018
Journal name Journal of Biomedical Materials Research Part B: Applied Biomaterials
Volume number 106
Issue number 6
Start page 2425
End page 2434
Total pages 10
Publisher John Wiley
Abstract This study investigates the microstructure, mechanical properties, corrosion behavior, and biocompatibility of magnesium (Mg)-based Mg1Zr2SrxDy (x = 0, 1, 1.63, 2.08 wt %) alloys for biodegradable implant applications. The corrosion behavior of the Mg-based alloys has been evaluated in simulated body fluid using an electrochemical technique and hydrogen evolution. The biocompatibility of the Mg-based alloys has been assessed using SaSO2 cells. Results indicate that the addition of Dy to Mg-Zr-Sr alloy showed a positive impact on the corrosion behavior and significantly decreased the degradation rates of the alloys. The degradation rate of Mg1Zr2Sr1.0Dy decreased from 17.61 to 12.50 mm year-1 of Mg1Zr2Sr2.08Dy based on the hydrogen evolution. The ultimate compressive strength decreased from 270.90 MPa for Mg1Zr2Sr1Dy to 236.71 MPa for Mg1Zr2Sr2.08Dy. An increase in the addition of Dy to the Mg-based alloys resulted in an increase in the volume fraction of the Mg2Dy phase, which mitigated the galvanic effect between the Mg17Sr2 phase and the Mg matrix, and led to an increase in the corrosion resistance of the base alloy. The biocompatibility of the Mg-based alloys was enhanced with decreasing corrosion rates. Mg1Zr2Sr2.08Dy exhibited the lowest corrosion rate and the highest biocompatibility compared with the other Mg-based alloys.
Subject Biomaterials
Metals and Alloy Materials
DOI - identifier 10.1002/jbm.b.34051
Copyright notice © 2017 WILEY PERIODICALS, INC.
ISSN 1552-4981
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