The microstructure and characteristics of the new alloy have been established and, for better performance, its surface was modified at micro- and nano-level depending on the proposed application. The alloy used in this work is one such example with Ti, Ta and Zr containing a small amount of Ag, intended to enhance the antibacterial properties. In the last years, high entropy alloys (HEAs) and medium entropy alloys (MEAs) were elaborated based on Fe, Zr, Ti and rare metals, keeping in their content elements with a very good biocompatibility. These alloys are formed with at least five principal elements in equiatomic or near-equiatomic proportions that lead to a single-phase solid solution. In looking for more performant metallic materials, a new class of multicomponent alloys (or high entropy alloys) was developed. The toxicity generated by ions that could be released from the metallic surface into the human body fibrous structures of Al and V, which are present in such approved alloys, has led, at the beginning of this century, to the promotion of binary titanium alloys with Zr, one of the most biocompatible elements of the system. The need to enhance the mechanical properties of pure titanium for various fields of applications has led to the elaboration and use of alloys such as TiAlV and TiAlNb which have been homologated and used intensively as biomaterials. Most of the metallic alloys used for implantology are based on titanium and stainless steel and used mainly in the orthopedic field due to their good mechanical properties. Starting in the middle of the last century, titanium was the most selected metallic material for many applications in various environments, including bioliquids due to its remarkable properties regarding its electrochemical stability and mechanical characteristics. Such behavior is promising in a potential bioapplication. The contact angle values of the coated samples are in the hydrophilic domain but are higher compared to the uncoated alloy values. From the FTIR determination, all the functional groups that appear demonstrated evidence of the presence of BG, ZnO and chitosan. From the SEM, the morphology of all the components from the mixture containing chitosan, bioglass and ZnO are shown to be present on the surface. The size of the ceramic particles is between 1 and 10 μm. Zeta potential measurements demonstrated evidence of a good stability of the coatings. Further analyses on the properties of the coating were performed using contact angle and roughness analysis. The mixtures and the samples obtained after applying the coating were characterized from a morphological and compositional standpoint using Scanning Electron Microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDX) and Fourier-transform infrared spectroscopy (FT-IR). A number of solutions with different component ratios were produced and analyzed by ζ potential and Dynamic Light Scattering (DLS) to determine the most stable mixture, which was subsequently deposited on the Ti-Zr-Ta-Ag samples. ![]() To make the suspensions used for deposition, several samples were made containing Ch, BG and ZnO in various mass ratios. ![]() New formulations based on chitosan (Ch) and bioglass (BG) were designed as multifunctional coatings to be deposited from suspensions on the mentioned alloy. New coatings on Ti-Zr-Ta-Ag capable of improving the alloys’ properties and to be suitable for more applications have yet to be fabricated. The starting point of this study is a new alloy with rare metals such as Ta and Zr that has Ag in the composition, proven antibacterial properties.
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