Effect of current density on copper incorporation in TiO2 coating of Ti-30Nb-5Mo alloy via micro-arc oxidation

• Grant number: 24/08094-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: October 01, 2024
• End date: December 31, 2025
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
• Principal Investigator: Carlos Roberto Grandini
• Grantee: Gustavo da Silva Diniz
• Host Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil
• Associated research grant: 24/01132-2 - Multidisciplinary Center for the Development of Assistive Technology (MCDAT), AP.CCD
• Associated scholarship(s): 25/05867-0 - Effect of current density on copper incorporation into TiO2 coating of Ti-30Nb-5Mo alloy via micro-arc oxidation, BE.EP.IC

Abstract

Titanium and its alloys are widely used as metal biomaterials due to their excellent characteristics, such as biocompatibility, corrosion and wear resistance, as well as good mechanical properties. Its application in the medical field encompasses a variety of devices, including orthopedic, dental, and cardiovascular needles, pins, screws, and implants. However, these materials are classified as bioinert, can trigger infections, and have limitations regarding rapid osseointegration, which contributes to the increase in cases of implant failure. In this context, this study aims to evaluate the impact of the current density applied during the micro arc oxidation (MAO) process on the incorporation of copper on the surface of the Ti-30Nb-5Mo alloy in order to improve the osseointegration properties, corrosion and wear resistance of this biomaterial, as well as to confer bactericidal properties, without compromising its cytotoxicity. To this end, the ingots will be melted in an arc furnace under a controlled argon atmosphere, followed by surface treatment through the MAO technique, using an electrolyte solution containing calcium, phosphorus and copper. Analyses of the composition, morphology and topographic properties of the treated surfaces will be carried out, as well as cytotoxicity and bactericidal tests. This study seeks to contribute to the development of more effective and safer biomaterials, aiming to improve integration with human tissue and reduce post-implantation complication rates.