|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Magnesium Technology 2021
||Lanthanum Phosphate Coating on Magnesium Alloys for Biomedical Application, Developed via Sol-Gel and Chemical Conversion Route
||Jithu Jayaraj, Ashitha P P, Suja P, Arun Kumar, Rajesh K R, Srinivasan A, Raghu K G, U T S Pillai
|On-Site Speaker (Planned)
Magnesium-based biomaterials are candidates to be used as new generation biodegradable metals. However, the uncontrolled degradation of Mg alloys leads to premature loss of mechanical integrity and intolerable hydrogen evolution from the implant. This could be greatly reduced by providing a suitable coating. In the present study, an attempt was made to develop lanthanum phosphate coating (LaPO4) on AZ31 magnesium alloy through sol-gel route and chemical conversion route. The chemical compositions and structures were characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDAX), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Degradation test was also conducted in Kirkland’s bio corrosion media for 60 days in physiological conditions and the degradation rate of sol gel coated substrates (0.09 mm/y) were less than 0.5 mm/y (benchmark). Cell viability and cytotoxicity were also studied and the result showed that LaPO4 coated AZ31 alloys have potential to be used as biodegradable implants.
||Magnesium, Surface Modification and Coatings, Biomaterials