HYDROXYAPATITE GRANULE IMPLANTED Ti-ALLOY

To obtain a biomaterial that has both biological affinity and high mechanical strength, hydroxyapatite granules were implanted into the surface of pure titanium film coated titanium alloy. The film was coated by reactive DC sputtering method on the alloy substrate. Hydroxyapatite granules (32- $38\mu\textrm{m}$ in diameter)were spread over titanium alloy substrate and pressed to implant the granules in the substrate. They can be implanted into substrate under 17MPa at $800^{\circ}C$ for 10minutes. The only tops of the granules were exposed and they were firmly stuck in substrate. The hydroxyapatite implanted titanium alloy composites were expected to be useful for biomaterials as artificial bones and dental roots.