Hydroxyapatite Granule Implantation into Superplastic Titanium Alloy

Abstract

To obtain a biomaterial which has both biological affinity and high mechanical strengths, the hydroxyapatite granules were implanted into surperplastic Ti-4.5Al-3V-2Fe-2Mo alloy substrates. It is known that this alloy becomes superplastic when heated to approximately 750°C. Hydroxyapatite granules (32-38μm in diameter) were spread over the alloy and pressed with a plunger. The granules were implanted into the substrate under 8.5MPa at 750°C for 10min. Granules were firmly bonded to the substrate. Granules adhered to the alloy were closed and product layers formed at the interface. The hydroxyapatite-granule-implanted titanium alloy was expected to be useful for biomaterials for artificial bones and dental roots.