Surface analysis of biocompatible coatings on titanium |
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| Affiliation: | 1. Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Física, Carrera 45, N. 26–85 - Edificio Uriel Gutiérrez, Bogotá D.C., Colombia;2. Instituto Nacional de Pesquisas Espaciais (INPE), Laboratório Associado de Sensores e Materiais (LAS), Av. dos Astronautas, 1758 - São José dos Campos, 12227–010 SP, Brazil;1. Departamento de Ciencia de Materiales, Facultad de Ciencias Químicas, Universidad Complutense, 28040, Madrid, Spain;2. Grupo de Ingeniería de Tejidos, Instituto de Estudios Biofuncionales, Universidad Complutense, 28040, Madrid, Spain;1. Department of Materials Science, Montanuniversität Leoben, Franz-Josef-Straße 18, A-8700 Leoben, Austria;2. Christian Doppler Laboratory of Advanced Coated Cutting Tools, Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, Franz-Josef-Straße 18, A-8700 Leoben, Austria;3. Materials Center Leoben Forschung GmbH, Roseggerstraße 12, A-8700 Leoben, Austria;4. Institute for Electron Microscopy and Nanoanalysis and Center for Electron Microscopy, Graz University of Technology, NAWI Graz, Steyrergasse 17, A-8010 Graz, Austria;5. Department of Materials Physics, Montanuniversität Leoben, Jahnstraße 12, A-8700 Leoben, Austria |
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| Abstract: | The coatings of hydroxyapatite, which is widely used for orthopaedic and dental prothesis, were deposited by using the dip-coating method. The layers of hydroxyapatite were grown on commercial Ti substrates. In order to improve the adhesion of hydroxyapatite, the substrate was a priori covered with titania or calcium titanate by using the sol-gel technique. For comparison, commercial samples of hydroxyapatite coating (manufactured by means of plasma-spray apparatus) were analysed. The chemical composition and the structure of the coatings (TiO2, CaTiO3 and hydroxyapatite) were studied by using X-ray photoelectron spectroscopy (XPS), scanning Auger microscopy (SAM), X-ray diffraction (XRD) and secondary electron microscopy (SEM) techniques. The data of quantitative XPS analysis and the surface images (SAM and SEM) displayed the superior quality (cleanness, homogeneity, etc.) of hydroxyapatite deposited by sol-gel in comparison with commercial samples investigated. |
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