Abstract
In recent years, development of magnesium (Mg) as biodegradable implant very rapidly in orthopedic applications . This is due to its young’s modulus close to young modulus of natural bone . However, Mg implants demonstrate higher biological activity which could cause high degradation rate in human bio-environment. Consequently, needed to develop Mg-based alloys with superior corrosion performance. In the present study, it has been attempted to develop biocomposite of Magnesium Zinc-5% Hydroxyapatite (MgZn-5%HAp) as biodegradable bone implant. The biocomposites were prepared by adding 5 wt. % powders to MgZn powder and then were sintered at temperature 350 o C in vacuum furnace for holding an hour. The characterization of MgZn-5 wt %HA p biocomposite was examined by Scanning Electron Microscopy with Energy Dispersive Spectroscopy ( SEM/EDS ) and X-ray diffraction ( XRD ) while corrosion test ed by potensiostat. The SEM / EDS and XRD results indicate d that some of the Zn atoms have dissolved in Mg to form a MgZn solid solution. The SEM results also showed that the MgZn-5%HAp biocomposite has a microstructure with a matrix Mg and HAp at the grain boundary. The presence of HAp in the sample resulted in a smaller crystallite size and corrosion rate compared to the one with MgZn alloy.
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call