title: Application of carbonated apatite coating on a Ti substrate by aqueous spray method.
abstract: The fabrication and characterization of a carbonate-containing apatite film deposited on a Ti plate via an aqueous spray method is described. The mist of the spray solution emitted from a perpendicularly oriented airbrush was made to strike a warmed Ti substrate. The thicknesses of the sprayed film and those heat-treated at 400 °C-700 °C under Ar gas flow were in the range 1.21-1.40 μm. The results of elemental analyses and Fourier transform infrared spectroscopy of the powders that were mechanically collected from the surface of the sprayed film suggest that the film was Ca(10)(PO4)6(CO3) · 2CO2 · 3H2O. The presence of the carbonate ion and the lattice CO2 molecule was confirmed via the aforementioned analyses; the finding was also consistent with the X-ray diffraction patterns of the films and the chemical identity of the sprayed and heat-treated films that were measured using X-ray photoelectron spectroscopy. The sprayed film comprises a characteristic network structure, which contains round particles within the networks, as was observed by field-emission scanning electron microscopy. A scratch test indicated that the shear stress of the sprayed film (21 MPa) significantly improved to 40 and >133 MPa after heat-treatment at 600 °C and 700 °C, respectively, under Ar gas flow for 10 min.
authors.affiliation: Division of Liberal Arts, Kogakuin University, 2665-1, Nakano, Hachioji, Tokyo 192-0015, Japan.
authors.forename: Chihiro
authors.initials: C
authors.lastname: Mochizuki
authors.affiliation: Division of Liberal Arts, Kogakuin University, 2665-1, Nakano, Hachioji, Tokyo 192-0015, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Hara
authors.affiliation: Department of Electrical Engineering, Kogakuin University, 2665-1, Nakano, Hachioji, Tokyo 192-0015, Japan.
authors.forename: Ichiro
authors.initials: I
authors.lastname: Takano
authors.affiliation: Department of Dental Engineering, Tsurumi University School of Dental Medicine, Tsurumi, Yokohama City, Kanagawa 230-8501, Japan.
authors.forename: Tohru
authors.initials: T
authors.lastname: Hayakawa
authors.affiliation: Division of Liberal Arts, Kogakuin University, 2665-1, Nakano, Hachioji, Tokyo 192-0015, Japan. Electronic address: lccsato@cc.kogakuin.ac.jp.
authors.forename: Mitsunobu
authors.initials: M
authors.lastname: Sato
mesh_terms: D001031:Apatites / Q000737:chemistry*; D001709:Biotechnology / Q000379:methods*; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D001031:Apatites; C030782:carboapatite; D014025:Titanium