Original Report
Plasma electrolytic oxidation coatings on γTiAl alloy for potential biomedical applications
L. Lara Rodriguez,
P. A. Sundaram,
E. Rosim-Fachini,
A. M. Padovani,
N. Diffoot-Carlo,
L. Lara Rodriguez
Department of Mechanical Engineering, University of Puerto Rico, Mayagüez, Puerto Rico, 00681
Search for more papers by this authorCorresponding Author
P. A. Sundaram
Department of Mechanical Engineering, University of Puerto Rico, Mayagüez, Puerto Rico, 00681
Correspondence to: P. A. Sundaram (e-mail: [email protected])Search for more papers by this authorE. Rosim-Fachini
Department of Physical Sciences, General Studies Faculty, University of Puerto Rico, San Juan, Puerto Rico, 00931
Search for more papers by this authorA. M. Padovani
Department of General Engineering, University of Puerto Rico, Mayagüez, Puerto Rico, 00681
Search for more papers by this authorN. Diffoot-Carlo
Department of Biology, University of Puerto Rico, Mayagüez Campus, Puerto Ricoz, 00681
Search for more papers by this authorL. Lara Rodriguez,
P. A. Sundaram,
E. Rosim-Fachini,
A. M. Padovani,
N. Diffoot-Carlo,
L. Lara Rodriguez
Department of Mechanical Engineering, University of Puerto Rico, Mayagüez, Puerto Rico, 00681
Search for more papers by this authorCorresponding Author
P. A. Sundaram
Department of Mechanical Engineering, University of Puerto Rico, Mayagüez, Puerto Rico, 00681
Correspondence to: P. A. Sundaram (e-mail: [email protected])Search for more papers by this authorE. Rosim-Fachini
Department of Physical Sciences, General Studies Faculty, University of Puerto Rico, San Juan, Puerto Rico, 00931
Search for more papers by this authorA. M. Padovani
Department of General Engineering, University of Puerto Rico, Mayagüez, Puerto Rico, 00681
Search for more papers by this authorN. Diffoot-Carlo
Department of Biology, University of Puerto Rico, Mayagüez Campus, Puerto Ricoz, 00681
Search for more papers by this authorAbstract
In an attempt to enhance the potential of gamma titanium aluminide intermetallic alloy as a biomaterial, its surface characteristics were successfully modified using a calcium and phosphorous rich electrolyte through the application of plasma electrolytic oxidation. Scanning electron microscopy and atomic force microscopy were used to characterize the morphology and topographical features of the resulting coating while X-ray diffraction and energy dispersive spectroscopy were used to determine the surface oxide composition. The mechanical properties of the surface coating were characterized by nanoindentation studies. The results observed show the formation of a submicron scale porous structure and a concomitant increase in the surface roughness. The surface oxide was composed of rutile and anatase phases. Composition gradients of Ca and P were also present which can possibly enhance the biomaterial application potential of this treated surface. Nanoindentation measurements indicate the formation of a fairly compact oxide during the process. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 102B: 988–1001, 2014.
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