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Play, download and edit the free video UnSchedule presentation - Investigation on ternary ZnAl-Li alloys as potential materials for cardio-vascular and....

The biodegradable Zinc alloys have become a promising candidate for the cardiovascular stent and orthopaedic applications. However, their lower strength and ductility have limited their applications for biomedical purposes. In this study, a new biodegradable zinc alloy with enhanced properties was developed using a novel rapid alloy development technique to avoid the labour incentive and costly experiments associated with alloy optimization. Here, the ternary Zn-Al-Li alloy system was investigated and the tensile strength, ductility and in-vitro corrosion behaviour for a range of alloys were optimized. It was found that for higher values of lithium (0.6 wt.%) and aluminium (4 wt.%) the ultimate tensile strength (i.e., 450 MPa) and ductility (i.e., 45% elongation) of the alloy was significantly improved. In parallel, the in-vitro corrosion behaviour of the developed alloys was measured in simulated body fluid using the immersion and potentiodynamic tests. The obtained results were close to in-vivo degradation rates of the pure zinc indicating sustainability of the developed materials for the biomedical applications. These findings shows promising applicability of the technique for investigating the complex Zn alloy systems and encourages further exploration for developing high strength biodegradable zinc alloys.

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