Modificação superficial do titânio CP 2 e da liga Ti6Al4V ELI para recobrimento através do método biomimético

Abstract

Titanium (Ti) and the Ti6Al4V ELI alloy are among the select metallic materials used as implant materials. Surface modification of these materials is required to achieve better integration between the biomaterial and the host tissue. This research aimed to coat the surface of commercially pure Grade 2 Titanium (Ti CP 2) substrates and the Ti6Al4V ELI alloy using a biomimetic process. Initially, the materials underwent surface modification through techniques involving double acid etching and basic etching, resulting in increased roughness and aiming for better adhesion of the subsequent coating to be deposited. Subsequently, the substrates were activated through thermal treatment and immersion in Sodium Silicate. These materials were then incubated in a solution known as SBF (Simulated Body Fluid), whose composition, pH, and temperature are similar to human blood plasma. The level of roughness post-chemical treatments and the obtained coating were analyzed through characterizations using Scanning Electron Microscopy (SEM/FEG), Energy Dispersive Spectroscopy (EDS), Optical Microscopy (OM), X-ray Diffraction (XRD), and Optical Profilometry. The Ti CP 2 and Ti6Al4V ELI substrates that underwent acid etching, followed by surface activation through thermal treatment and immersion in Sodium Silicate, and were incubated in SBF for 21 days, showed superior efficiency concerning the quality of the coating.