Date of Award

Spring 2015

Document Type

Thesis

Degree Name

Master of Science in Materials Science and Engineering - (M.S.)

Department

Committee for the Interdisciplinary Program in Materials Science and Engineering

First Advisor

Joseph W. Bozzelli

Second Advisor

R. P. T. Tomkins

Third Advisor

Roumiana S. Petrova

Abstract

Plasma electrolytic oxidation (PEO), a novel method for forming ceramic coatings on metals, has been researched extensively in recent times. By applying high voltage between dielectric thin films, a plasma micro-arc is induced through penetration of breakdown in film boiling layer. Such a method takes advantage of high processing time, low equipment requirement and advanced coating performance.

Titanium alloys, Ti-6Al-4V and pure Titanium Grade 2, are two of most common Titanium alloys in daily use. Both of such Titanium alloys show great potential utilization in bio-medicinal application, especially in implants, for its excellent biocompatibility, high tensile strength, and high elastic modulus. However, in vivo environment is hazardous for metals and alloys. The body fluid is corrosive for metallic implants even for the chemically stable Titanium alloys. Thus methods have been used for surface modification and coating. Plasma electrolytic oxidation has shown its advantage on such demands.

In this thesis, the in vitro corrosion experiment is done on the PEO treated Titanium alloys .The potential of PEO treated metals has few tests in vitro before for bio-medicinal usage. And also the potential dental and implants utilization of PEO treated Titanium alloys can be fulfilled by such analysis and qualified for in vivo test. The surface morphology is analyzed by various of methods in microscopy, electrochemical methods and XRD.

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