Paper Title
To Develop Biodegradable Mg based Metal Ceramic Composites as Bone Implant Material

Abstract
Biodegradable materials for orthopedic implants have gained much attention due to their similar properties to natural bone. Magnesium based alloys are considered the best biodegradable material for bone substitute materials. However, magnesium alloys have very high corrosion rate. Research has been focused to fabricate and to make their composites to control their corrosion rates in human physiological environment and to develop the ability of formation of bone-like apatite layer on their surface. In the present study, Mg-Zn-Mn metal alloys were selected for making their composites with hydroxide apatite and bio glasses. Hydroxide apatite was prepared by coprecipitation method and borate based bioactive glasses were prepared by melting and quenching method. Samples from metal-ceramic composites were prepared by powder metallurgy route in various compositions. Further, samples were characterized for their phases, microstructure, corrosion behavior, mechanical properties and bioactivity. The composites showed bioactivity in SBF solution and their young’s modulus values were obtained near to human bone. The degradation properties as studied in SBF solution revealed that mg based alloys composites having approximately 10% BAG and 10 % β – TCP resulted in reduction of the corrosion rate.