Banca de DEFESA: RODRIGO RIBEIRO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RODRIGO RIBEIRO
DATE: 03/05/2024
TIME: 09:00
LOCAL: Sala 151 - Demat
TITLE:

PROCESSING AND APPLICATION OF TIO2 NANOSTRUCTURED THIN FILMS, BY MEANS OF ANODIC ELECTROCHEMICAL TREATMENT, WITH EMPHASIS ON THE TRIBOLOGICAL AREA FOR THE IMPROVEMENT OF ORTHOPEDIC AND DENTAL IMPLANTS

KEY WORDS:

Tribological tests, anodizing; TiO2 films

PAGES: 65
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Metalurgia Física
SPECIALTY: Propriedades Físicas dos Metais e Ligas
SUMMARY:

Literature has recently described that the interaction between an implant and bone tissue is due to a combination of ultrastructural factors, such as morphology and the surface chemical composition of the device to be implanted. The long history of success of titanium and its alloys in implant dentistry reinforces that under conditions of control of passivation, the surface has a natural film of thickness varying from 1.5 to 10nm, composed of titanium dioxide (TiO2) capable of provoking a biological response more favorable. In this work, the surface of the Ti6Al4V alloy will be optimized through an electrochemical anodization process. This process aims to change the morphology of the titanium dioxide (TiO2) layer in order to increase its tribochemical behavior and biocompatibility. The effect of processing parameters on film characteristics will be evaluated, such as film thickness (TiO2), abrasive wear coefficient, microhardness and roughness. In this way, the aim is to provide better biofixation of the biomaterial to the bone tissue. Through the anodization process, a thin TiO2 film was produced, with nanotubular characteristics (TNT) to be analyzed regarding morphological, physical, tribological and biological aspects. In this anodization process, TNTs will be produced from anodization with an electrolyte of C6H8O7 (0.1 mol/L) + NaF (0.5% w/w), application of DDP at 20 V DC, for 90 minutes. The morphological and chemical characterization to be carried out will involve Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM/EDS), X-ray Diffraction (XRD) and X-ray Fluorescence (XRF). The characterization of the biomaterial may determine the combination of process variables that will positively modify the film formed and enable greater reliability for electrochemically coated products.

COMMITTEE MEMBERS:
Externa à Instituição - CLEIDE BARBOSA SOARES - CEFET-MG
Interno - HERMES DE SOUZA COSTA
Externo ao Programa - SANDRO CARDOSO SANTOS
Presidente - SIDNEY NICODEMOS DA SILVA