INVESTIGATION OF PROPERTIES OF OXIDES FORMED IN THE Nb-25Ta-35Ti ALLOY USING MICRO ARC OXIDATION

• Grant number: 24/22415-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: March 01, 2025
• End date: February 28, 2026
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
• Principal Investigator: Carlos Roberto Grandini
• Grantee: Gabriel Cardoso Rôa
• 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

Abstract

Biomaterials, when implanted in the human body, perform an interface with the biological system, with the function of restoring or replacing organs and tissues. Ti or Nb-based alloys have relevant characteristics to be used in the biomedical area, including proven biocompatibility, good mechanical and corrosive resistance, and low modulus of elasticity. However, despite the significant properties already highlighted, there is a considerable increase in the number of revision surgeries, and infectious factors represent one of the main causes for implant replacement. This project aims to functionalize surfaces with bioactive elements, through the micro arc oxidation technique, in the Nb-25Ta-35Ti alloy. The different oxide films that can be formed, including TiO¿, Ta¿O¿ and Nb¿O¿, will be investigated, as well as the effect of the variation of the anodic potential difference on the growth of the films. The parameters adopted will directly influence the surface of the alloy and the biofunctionalized films produced, offering the patient better osseointegration and greater efficiency in the long term. From the incorporated elements, greater bioactivity is expected, in addition to the antimicrobial effect.