| 摘要 |
Provided is a method for producing multifunctional materials which exhibits high photocatalytic activity, which can readily adsorb even VOCs, which has a high coating hardness, and which exhibits excellent heat resistance, corrosion resistance, exfoliation resistance, and wear resistance. The method includes thermally treating a substrate in which a surface layer thereof is formed of titanium, titanium oxide, a titanium alloy, or a titanium alloy oxide by applying a combustion flame to a surface of the substrate so that the temperature of the surface layer is raised to 600°C or higher, or thermally treating a surface of the substrate in an oxygen-containing gas atmosphere so that the temperature of the surface layer is raised to 600°C or higher, to thereby provide, in the interior of the surface layer, a layer formed of forest microcolumns of titanium oxide or a titanium alloy oxide; and subsequently cutting the layer formed of the forest microcolumns in parallel with the surface layer, to thereby yield a material including the substrate and a layer formed of the titanium-oxide- or titanium-alloy-oxide-formed forest microcolumns exposed on at least a portion of the substrate, as well as a material including a thin film, numerous continuous small-width protrusions which are provided thereon, and forest microcolumns formed on the protrusions, wherein the protrusions and microcolumns are formed of titanium oxide or a titanium alloy oxide and exposed on the thin film. |
