Abstract
Calcium phosphate growth on phosphorus ion implanted titanium substrate was studied. Phosphorus ions were implanted into titanium substrates with an acceleration energy of 45 KeV and in amounts of 1x1016-3x1017 ion/cm2. After immersion in SBF solution, calcium phosphate was formed on the phosphorus ion implanted titanium substrate. The implanted phosphorus ions reach a depth of 200-300 nm from the surface and phosphorus ions do not exist on the surface as a result of ion implantation as revealed using AES. So implanted phosphorus ions do not participate in the calcium formation. The surface oxide of titanium grew up to 100nm and was covered by hydroxyl group in SBF solution. Calcium or phosphate ions in SBF solution can be adsorbed by the oxide surface. The deposition of calcium phosphate involves adsorption of calcium or phosphate ions leading to an elevation of the calcium or phosphate ions which in turn must accelerate the formation of calcium phosphate.
