Abstract
A technique to deposit titanium films with rutile-TiO2 layer at the top was carried out in two steps: the deposition of titanium by means of cathodic vacuum arc (CVA) followed by a thermal oxidation technique was investigated. As a result, well adhering rutile films occurred in the near surface region. The uncoated and coated substrates were investigated using X-ray diffraction (XRD) and energy dispersive x-ray spectroscopy (EDX). The presence of rutile phase titanium dioxide and titanium metal was confirmed by XRD. Cavitation erosion was used to investigate the protective adhesion properties of these coatings. Cavitation erosion tests confirmed that rutile TiO2 films with a Ti inter layer adhere well to stainless steel substrates and protect the substrate from erosion.
Highlights
Titanium dioxide (TiO2) is a semiconducting material which may be used in a wide variety of technology applications such as temperature sensor, photocatalysis, electrolyte in solar cells, gas sensor, white pigment, corrosion protective coating, and optical coating, in memory devices, and as anode material Li batteries [2,3,4,5]
Several titanium films were oxidized for different periods (1, 3, 5, and 7 hours) and subsequently analysed by X-ray diffraction (XRD)
The possibility of preparing crystalline titanium dioxide TiO2 rutile phase on stainless steel substrates has been shown by the thermal oxidation of titanium
Summary
Titanium dioxide (TiO2) is a semiconducting material which may be used in a wide variety of technology applications such as temperature sensor, photocatalysis, electrolyte in solar cells, gas sensor, white pigment, corrosion protective coating, and optical coating, in memory devices, and as anode material Li batteries [2,3,4,5]. A layered film structure (TiO2 or Ti) shows good adhesion on stainless steel substrates This layered film structure can be obtained by thermal oxidation of titanium films to rutile phase [8]. Deuerler and co-worker [16] shows that the cavitation erosion technique was successfully utilized to evaluate the adhesion behavior on other systems, e.g. diamond coatings [16] or metal films on polymer substrates[17] It seems to be promising technique for the TiO2 films on steel substrate. The work described in this manuscript shows an effective process of producing rutile film with improved adhesion to stainless steel substrates, and introduced the cavitation erosion method to evaluate the coating adhesion
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