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QUANTITATIVE DEPTH PROFILE ANALYSIS OF SOL-GEL TiO2-ZrO2 FILMS ON STAINLESS STEEL

Surface engineering in solids has become an important field in materials science. For improvement of properties of metallic materials different types of coating as well as different deposition techniques have been used. Most common used deposition techniques, such as physical vapour deposition (PVD), chemical vapour deposition (CVD), electrochemical deposition, plasma spraying, etc., are very expensive. The deposition of films by sol-gel method as low cost offer potential advantages over mentioned techniques such as low temperature processing, the capability to coat materials of various shapes and/or large area, easy adjustment of films thickness, to control the composition and homogeneity. Most commonly used methods for sol-gel film deposition are spin-, dip- and spry-coatings. In this paper, titania (TiO2) zirconia (ZrO2) thin films with one-layer, three-layer and fivelayer were deposited on the X2CrNiMo17-12-2 (AISI 316L) austenitic stainless steel by dip coating sol-gel process. For the preparation of sol titanium isopropoxide and zirconium butoxide were used as a precursors, i-propanol as a solvent with addition of nitric acid as a catalyst, acetylacetone for peptization and water for hydrolysis. All deposited films were calcined at the temperature of 400 °C and 600 °C. For quantitative depth profile analysis of sol-gel TiO2-ZrO2 films deposited on stainless steel glow-discharge optical emission spectrometry (GD-OES) was used. Obtained results indicated that depth of deposited films increasing by increase number of deposited layers. Also, it was found that diffusion of some elements (Cr and Fe) from substrate is increasing by increase temperature of heat treatment. Glow-discharge optical emission spectrometry (GD-OES) as fast, easy-to-use analytical technique has proven to be a powerful tool for the rapid analysis of elements in the surface of solids as well as for elemental concentrations as a function of depth in nanoscale.

sol-gel TiO2-ZrO2 films; stainless steel; QDP

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