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Plasma electrolytic oxidation coatings on γTiAl alloy for potential biomedical applications
Author(s) -
Lara Rodriguez L.,
Sundaram P. A.,
RosimFachini E.,
Padovani A. M.,
DiffootCarlo N.
Publication year - 2014
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.33079
Subject(s) - materials science , nanoindentation , plasma electrolytic oxidation , intermetallic , coating , oxide , scanning electron microscope , metallurgy , surface roughness , titanium alloy , surface finish , alloy , biomaterial , energy dispersive x ray spectroscopy , chemical engineering , electrolyte , composite material , nanotechnology , chemistry , electrode , engineering
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.