Regarding research on biomedical materials Gr.5 medical titanium, at present, China and abroad mainly aim to improve the functional characteristics such as bioactivity, biocompatibility, and wear resistance of Ti6Al4V surface, which are mostly achieved by preparing functional films and coatings on its surface.
First, we come to introduce the film.
Coating a layer of TiO2 film on the surface of Ti alloy can effectively improve its bioactivity, but it is prone to problems that the thickness of the film is not uniform and the bonding strength is not high. Li Kewen prepared graphene coating on Gr.5 medical titanium surface by film transfer method with the help of graphene conductive film. It was found that the graphene coating had good bonding with the matrix, increased hydrophilicity and surface roughness, and improved bioactivity and biocompatibility, but the mechanical properties were not changed. The preparation of graphene coatings on the surface of titanium alloy Ti6Al4V has gained increasing attention and applications in recent years, but the quality and effect of its coatings are greatly affected by the graphene preparation process, and certain preparation processes can lead to the generation of cytotoxicity. For example, graphene prepared by chemical vapor deposition may significantly accelerate the rate of neuronal apoptosis and increase the probability of reactive oxygen species (ROS) occurring in neuronal cells.
Wufanbuick bhakti et al. Used plasma-enhanced chemical vapor deposition (PECVD) technology to prepare diamond-like carbon films on Gr.5 medical titanium surfaces with different roughness, Furthermore, a systematic study of membrane-based bonding, corrosion, and biocompatibility was performed, The diamond-like film has the highest bonding force with the substrate up to 45 N, Corrosion resistance, biocompatibility has been improved, Preparation of diamond-like films on Ti6Al4V surfaces is an effective surface modification method.
Fabrication of diamond-like film coating on the surface of titanium alloy although good clinical results have been achieved, diamond-like is poorly resistant to wear loss, easy to form debris and form a thrombus.
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