Banca de DEFESA: ANA KARENINA DE OLIVEIRA PAIVA
Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ANA KARENINA DE OLIVEIRA PAIVA
DATA : 23/03/2018
HORA: 15:30
LOCAL: Auditório da SEDIS/UFRN
TÍTULO:
TREATMENT OF TITANIUM SURFACES BY OXIDATION TO THE ELECTROLYTIC PLASMA FOR BIOMEDICAL USE
PALAVRAS-CHAVES:
Surface treatment, Biomedical implants, Titanium, PEO.
PÁGINAS: 13
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
RESUMO:
Biomedical implants have emerged to solve various health problems, mainly in patient rehabilitation, through dental implants, improving a quality of life. Researches on implant surfaces that provide a need to obtain a rapid osseointegration in areas of low bone density, numerous researches have been developed to modify the surface morphology. There are several processes involving mechanical, chemical and physical methods, aiming at the most varied degrees of textures. Among them, there is an Electrolytic Plasma Oxidation (PEO). In order to solve the problem, PEO was used as a surface treatment method. They were treated with 18 cylinders of grade II titanium, 3 mm in diameter and 25 mm in length. The treatment time was 1, 8 and 16 minutes. An electrolytic solution was at room temperature and applied measurement of 290 V. After the treatments, as samples were characterized by X-Ray Fluorescence (FRX), Optical Microscopy (OM), Scanning Electron Microscopy (SEM) and Lightning Spectroscopy -X and Dispersive Energy (EDS). Empute Atomic Force Microscopy (AFM) for surface texture characterization. Visual inspection and wettability tests were also carried out. The presence of TiO2 on the surface of the sample is identified in the work by means of chemical analysis by X-ray Fluorescence. It was verified in the MEV that the coatings exhibit a porous characteristic, presenting an interface well adhered and without presence of empty spaces. In the images of the AFM it was observed that with the increase of the treatment time with a greater roughness and increase of the homogeneity of the distribution of the ceramic crystals in the surface. In the wettability tests they presented a lower wetting angle for samples with PEO treatment with time of 1 and 8 minutes. It is concluded that the Electrolytic Plasma Oxidation technique proved to be effective in the deposition of a ceramic coating on the surface of the titanium alloy.
MEMBROS DA BANCA:
Externo ao Programa - 1752038 - CUSTODIO LEOPOLDINO DE BRITO GUERRA NETO
Presidente - 1544724 - GLAUCIO BEZERRA BRANDAO
Externo à Instituição - JOAO PAULO QUEIROZ DOS SANTOS - IFRN
Externo ao Programa - 2488270 - RICARDO ALEXSANDRO DE MEDEIROS VALENTIM