抄録
Hydroxyapatite (HA) coatings on Ti implants are made by the physical methods, mainly plasma spraying. We have developed a new chemical coating technique, thermal decomposition method. This method consisted of applying HA or perovskite (CaTiO3) coating solution containing organometals, phosphate ester (only in HA solution), and organic solvents onto the surface of Ti and then sintered it at 650°C. The process was repeated several times. The thin and homogeneous layer included an initial CaTiO3 layer with a thickness of 0.6 μm followed by an HA layer (2.4 μm) on top. The underlying CaTiO3 layer reduced oxidation of the Ti substrate and enhanced stability of the coating.
