Influence of heat treatment cooling mediums on the degradation property of biodegradable Zn-3Mg alloy
MetadataShow full item record
Recently, Zn-based alloys were introduced as alternative biodegradable metals to the well-studied Mg and Fe based alloys for temporary implants. In this work, Zn-3Mg alloy was developed using a conventional casting method followed by heat treatment with different cooling media. As-cast samples were heat treated at 370 o C for 10 hours then cooled in open air, water bath and inside furnace environments. The microstructure of as-cast alloy was characterized under optical microscope and phase analysis was evaluated using X-ray diffraction (XRD) technique. Potentiodynamic polarization tests were carried out on the heat treated samples for evaluating the degradation rate. It was observed that as-cast Zn-3Mg alloy consists of star-like-shape of primary Zn-rich dendrites which are segregated in the eutectic mixture of Mg 2 Zn 11 phase. The segregation of these dendrites has been significantly reduced under water bath cooled treatment as compared to open air and inside furnace cooling. It is also found that the microstructure of the water cooled samples is more homogenous with less porosity than the as-cast, air or furnace cooled samples. The water cooled sample exhibits better degradation resistance for at least 2 folds than other treatments. © (2014) Trans Tech Publications, Switzerland.
Showing items related by title, author, creator and subject.
Influence of thermal treatment on microstructure, mechanical and degradation properties of Zn-3Mg alloy as potential biodegradable implant materialDambatta, M.; Izman, S.; Kurniawan, Denni; Farahany, S.; Yahaya, B.; Hermawan, H. (2015)© 2015 Elsevier Ltd. In this study, the influence of homogenisation heat treatment effect on Zn-3Mg alloy proposed for biodegradable bone implants was investigated. The alloy was developed via casting process from high ...
Dambatta, M.; Izman, S.; Hermawan, H.; Kurniawan, Denni (2014)The Zn based alloy has a high potential to be the next generation of biodegradable implant material. Development of this biomaterial involves casting process which often associated with various defects. In this study, ...
Influence of homogenization treatment on the degradation behavior of Zn-3Mg alloy in simulated body fluid solutionDambatta, M.; Kurniawan, Denni; Sudin, I.; Yahaya, B.; Hermawan, H. (2016)This paper reports a degradation study of Zn-(3 wt%) Mg alloy proposed for biodegradable medical implants. The alloy was cast from high-purity raw materials and homogenized at 370 ° C for 15 h under vacuum and water ...