| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Society for Biomaterials: Biomaterial Applications
|
| Presentation Title |
Biodegradable Ceramic Coating on Lithium-Aluminum-Zinc (LAZ) and Lithium- Zinc (LZ) Magnesium Alloys Using Micro-arc Oxidation |
| Author(s) |
Prashant Nagesh Kumta, John Ohodnicki, Abhijit Roy |
| On-Site Speaker (Planned) |
John Ohodnicki |
| Abstract Scope |
Biodegradable magnesium-based alloys containing lithium, aluminum, and zinc (LAZ) exhibit ultra-high ductility, but are limited in their use as a biodegradable bone scaffold due to rapid corrosion and consequent prevalence of increased cytotoxicity. The presence of multiple phases within the LAZ containing magnesium alloys also results in increased galvanic corrosion. The goal of this work was to reduce the corrosion rate of the LAZ magnesium-based alloys in order to increase their effectiveness as biodegradable biomaterials.
Micro-arc oxidation (MAO) treatment using electrolyte containing fluorides, phosphates, and silicates form a corrosion resistant layer on the surface of these alloys. The deposited coating was characterized by XRD, SEM, and FTIR. Potentiodynamic polarization tests and in-vitro immersion testing confirmed that the MAO coatings significantly decreased the corrosion rate and overall release of metallic ions. In-vitro cytocompatibility studies revealed that MAO coated alloys also exhibited increased cell attachment and proliferation. |