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The chemical functions of inorganic films, including biocompatibility, thermo-electric characteristics, catalytic activity, and corrosion resistance are influenced greatly by internal factors such as the composition, crystal structure, grain boundary, and defect of the material. To provide more sophisticated functions to films, a technique for producing films with those internal factors controlled at a high level must be established. Studies are being conducted on techniques for producing inorganic films with sophisticated chemical functions by creating and using gas phase reaction fields capable of controlling reactions at the atomic and molecular levels.
Studies on biocompatible ceramic coatings have developed a radio-frequency thermal plasma spraying method and, for the first time, a high-grade Hydroxyapatite (HAp) coated film with controlled composition and orientation. The film is expected to be applied in areas such as artificial joints.
R.f.thermal plasma apparatus for coating of HAp
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