| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Biodegradable Materials for Medical Applications II
|
| Presentation Title |
B-11: Novel Method for Increasing Mechanical Properties of Biodegradable Zinc |
| Author(s) |
Anna Jarzebska, Magdalena Bieda-Niemiec, Łukasz Maj, Martyna Strąg, Daniel Wojtas, Robert Chulist, Jan Guśpiel, Wacław Pachla, Krzysztof Sztwiertnia |
| On-Site Speaker (Planned) |
Anna Jarzebska |
| Abstract Scope |
Zinc seems to be the best candidate as material for producing biodegradable stents because of its optimal corrosion rate. The only limitation is low mechanical properties. In order to increase strength and ductility of zinc effect of cumulative hydrostatic extrusion and magnesium alloying up to 1.5 wt. % was proposed. To analysis the effect microstructure characterization via SEM/EBSD and TEM techniques was performed. Mechanical properties were established based on static tensile test. Influence of the method on corrosion rate was investigated by electrochemical and immersion tests.
Subjecting low-alloyed zinc to hydrostatic extrusion gave great improvement in both strength and ductility, exceeding requirements for stents application. Such behavior can be ascribed to received unique microstructure resembling a composite composed of ultra-fine zinc’s grains bands alternately arrange with bands of refine to nanometer scale eutectic phase. Obtained results indicate that proposed method allows to gain excellent mechanical properties without deteriorating corrosion rate. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |