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XRD and XPS characterization of superplastic TiO2coatings prepared on Ti6Al4V surgical alloy by an electrochemical method

✍ Scribed by M. Shirkhanzadeh

Publisher: Springer
Year: 1995
Tongue: English
Weight: 753 KB
Volume: 6
Category: Article
ISSN: 0957-4530
DOI: 10.1007/bf00146857

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✦ Synopsis

X-ray diffraction (XRD) and X-Ray photoelectron spectroscopy (XPS), in conjunction with argon ion etching, were used to characterize the microstructure and the chemical composition of alkoxy-derived TiO2 coatings prepared on Ti6AI4V surgical alloy by an electrochemical method. The as-deposited oxide coatings prepared at room temperature (up to 40 lam thick) were amorphous, but transformed into nanocrystalline anatase at 550 °C. Using a micro-indentation technique, it was found that nanocrystalline anatase coatings were ductile, permitting significant plastic deformation at room temperature. The XPS data also revealed the presence of significant proportion of physisorbed (OH) and chemisorbed H20 (i.e. Ti-OH) on the oxide surface, indicating that these coatings, similar to sol-gelprepared titania, may serve as reactive substrates for heterogeneous nucleation of apatite under physiological conditions.

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## Abstract The excellent biocompatibility of titanium and its alloys used, for example, for medical devices, is associated with the properties of their surface oxide. For a better understanding of the tissue reaction in contact with the oxide layer, knowledge of the chemical and physical propertie