|About this Abstract
||Materials Science & Technology 2011
||Next Generation Biomaterials
||Development of Magnesium-Zinc-Calcium Biodegradable Alloys
||Zhigang Xu, Christopher Smith, Jag Sankar
|On-Site Speaker (Planned)
Magnesium alloys as biodegradable medical materials have attracted much attention in recent years and there is an urgent need for developing fully biocompatible magnesium alloys. For a magnesium alloy to be fully biocompatible, it should contain only biocompatible elements and has well controlled degradation rates. The purpose of this project is to develop novel magnesium alloys containing fully biocompatible elements, such as Zn and Ca. Alloys with different concentrations of these alloying elements are developed by melting Mg ingot and Zn and Ca granules in mild steel crucibles. Once homogenized, the melt were cast into rods. A series of heat treatment studies including solution treatments and artificial aging are performed. The microstructure and composition of the alloys were investigated by using XRD, optical microscopy, SEM, and EDS, respectively. Corrosion tests were carried out to evaluate the effects of the composition, type and parameter of heat treatments on the biodegradation rate.