title: Bio-inspired citrate-functionalized apatite thin films crystallized on Ti-6Al-4V implants pre-coated with corrosion resistant layers.
abstract: In this paper the crystallization of a bioinspired citrate-functionalized apatite (cit-Ap) thin film (thickness about 2μm) on Ti-6Al-4V supports pre-coated with bioactive and corrosion resistant buffer layer of silicon nitride (Si3N4), silicon carbide (SiC) or titanium nitride (TiN) is reported. The apatitic coatings were produced by a new coating technique based on the induction heating of the implants immersed in a flowing calcium-citrate-phosphate solution at pH11. The influence of the buffer layers and the surface roughness of the substrate on the chemical-physical features and adhesion of the cit-Ap films were investigated. The best plasticity, compactness and adherence properties have been found in the Ap layer grown on Si3N4, followed by the Ap grown on SiC and TiN, respectively. The adhesion property was likely related to the roughness of the buffered substrates, whereas the compactness and plasticity were closely related to the operating conditions during the Ap crystallization (flow rate of the solution and increase of temperature) rather than to the nature of the buffer layer.
authors: Laboratorio de Estudios Cristalográficos, IACT (CSIC-UGR), Av. Las Palmeras 4, E-18100 Armilla, Spain.
authors: José Manuel
authors: JM
authors: Delgado-López
authors: Michele
authors: M
authors: Iafisco
authors: Isaac
authors: I
authors: Rodríguez-Ruiz
authors: Jaime
authors: J
authors: Gómez-Morales
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D001031:Apatites / Q000737:chemistry*; D019343:Citric Acid / Q000737:chemistry*; D015921:Dental Implants; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014639:Vanadium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D001031:Apatites; D015921:Dental Implants; D014639:Vanadium; D019343:Citric Acid; D000535:Aluminum; D014025:Titanium
keywords: Bioinspired; Buffer layers; Citrate-apatite layer; Induction heating; Ti–6Al–4V implants