Date of Award

2012

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Mechanical Engineering

First Advisor

Sankar, Jagannathan Dr.

Abstract

The objective of this study is develop some understanding of biodegradable, ceramic coatings that control the rate of corrosion of a magnesium-based implant by: optimizing parameters for fabricating metal oxides, determining surface roughness parameters, determining dependence of resorption time on coating thickness and determining the biological compatibility of aluminum oxide, ferric oxide and zinc oxide. Magnetron sputtering has been used to manufacture high quality ceramic coatings through pulsed direct current sputtering technique. Aluminum oxide, zinc oxide and iron oxide were characterized by an optical density method, x-ray diffraction, scanning electron microscopy and atomic force microscopy. From this study, it was determined that: 1) magnetron sputtering can produce high quality, metal oxide films, 2) an optical density method can be used to obtain resorption rates of aluminum oxide coating and 3) aluminum oxide, iron oxide and zinc oxide exhibit promising biocompatibility based xvii upon results from adhesion and LIVE/DEAD cell viability assays. Aluminum oxide, ferric oxide and zinc oxide would serve as good biocompatible, galvanic separators and would control the rate of corrosion of a magnesium-based implant. Using ceramic materials as intermediate layers between magnesium-based implants and functional metallic coatings has the ability to create many applications for the use of magnesium implants.

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