ESTUDO SOBRE A INFLUÊNCIA DO TEMPO DE EXPOSIÇÃO DO SUBSTRATO DE ALUMÍNIO AO TRATAMENTO POR PLASMA ELETROLÍTICO

Resumo

Material surface treatment aims to provide the new characteristics of the material without changing its internal properties, and as a result, increases the reach of their applications. In this study, a relatively new technique called Plasma Electrolytic Oxidation (PEO) was used to ceramic thin films. Aluminum alloy samples was treated by PEO process for different exposition times, ranging from 600 s to 1200 s. This study aimed to improve the investigation about the technique and surfaces properties. Regarding the characterization, optical microscopy, scanning electron microscopy and x-ray diffraction with grazing incidence was use. The results showed that the film growth is influenced by the exposure time. Analysis by optical microscopy at 900 s sample showed a significant growth of the film despite having the largest amount of deposition. It is also observed that the growth of the film is homogeneous.