Design of novel Zn-Ag-Zr alloy with enhanced strength as a potential biodegradable implant material

Research output: Contribution to journalArticle

Authors

  • Maria Wątroba
  • Wiktor Bednarczyk
  • Jakub Kawałko
  • Krzysztof Mech
  • Marianna Marciszko
  • Gabriela Boelter
  • Piotr Bała

Colleges, School and Institutes

External organisations

  • Faculty of Physics and Applied Computer Science
  • Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Birmingham, United Kingdom.

Abstract

In this study, a new biodegradable alloy from the Zn-Ag-Zr system was investigated. Most importantly, mechanical properties and ductility were significantly improved in designed Zn1Ag0.05Zr alloy in comparison to binary Zn1Ag and previously investigated Zn0.05Zr alloys (wt%). The characterized alloy reached values of yield strength, ultimate tensile strength and elongation to failure equal to 166 ± 2 MPa, 211 ± 1 MPa and 35 ± 1%, respectively. Simultaneous addition of both alloying elements contributed to solid solution strengthening, intermetallic Zr-rich phase formation, and effective grain refinement. Immersion and electrochemical in vitro corrosion tests showed a slight increase of degradation rate in ternary alloy up to 17.1 ± 1.0 μm/year and no significant loss of mechanical properties after 28-day of immersion in simulated physiological solution. In addition, the preliminary antimicrobial studies show antimicrobial activity of the investigated Zn-Ag-Zr alloy against Escherichia coli and Staphylococcus aureus. The presented results demonstrate that newly developed Zn-based alloy can be considered as a promising biodegradable material for medical applications.

Details

Original languageEnglish
Article number108154
Number of pages12
JournalMaterials and Design
Volume183
Early online date26 Aug 2019
Publication statusPublished - 5 Dec 2019

Keywords

  • Antimicrobial properties, Biodegradable, Corrosion behavior, Mechanical properties, Microstructure, Zn-based alloy