Nanomechanical properties of titanium coated with octacalcium phosphate by immersion in a simplified simulated body fluid

摘要

In this study we report on the microstructure and its mechanical behavior of a Ca-P coating produced on bioactive titanium by immersion in a simplified simulated body fluid (S-SBF). The coating was probed by nanoindentation in several point times up to the formation of octacalcium phosphate (OCP). Amorphous calcium phosphate, formed after lh of immersion in S-SBF, presented the highest values of hardness (H) and elastic modulus (E). Nucleation of OCP was observed after 2-2,5h of immersion in S-SBF. From this stage on, lower values of H and E were obtained, probably due to the low dense structure of the coating.