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Potentiodynamic Polarization Studies and Surface Chemical Composition of Bismuth Titanate (BixTiyOz) Films Produced through Radiofrequency Magnetron Sputtering.
Alfonso, José E; Olaya, Jhon J; Pinzón, Manuel J; Marco, José F.
Afiliação
  • Alfonso JE; Grupo de ciencia de materiales y superficies, Universidad Nacional de Colombia, Bogotá AA 14490, Colombia. jealfonsoo@unal.edu.co.
  • Olaya JJ; Associate Researcher of Centro Internacional de Física (CIF), Bogotá 14490, Colombia. jealfonsoo@unal.edu.co.
  • Pinzón MJ; Grupo de ciencia de materiales y superficies, Universidad Nacional de Colombia, Bogotá AA 14490, Colombia. jjolayaf@unal.edu.co.
  • Marco JF; Departamento de Ingeniería Mecánica y Mecatrónica, Universidad Nacional de Colombia, Bogotá AA 14490, Colombia. jjolayaf@unal.edu.co.
Materials (Basel) ; 6(10): 4441-4449, 2013 Oct 08.
Article em En | MEDLINE | ID: mdl-28788338
The applications of Bismuth Titanate (BixTiyOz) materials have been focused on their electronic and optical properties, but with respect to the use of these compounds in applications like corrosion resistance, have been very few or nonexistent. For this reason, in the present investigation BixTiyOz thin films were deposited using RF magnetron sputtering onto silicon wafers, stainless steel 316L, and titanium alloy (Ti6Al4V) substrates, in order to carry out a study of the corrosion behavior of this compound. The structural properties of the coatings were studied through X-ray diffraction (XRD), the morphology was determined using Scanning Electron Microscopy (SEM), the corrosion resistance behavior of the coated and uncoated substrates was evaluated via the Potentiodynamic Polarization technique, and surface chemical composition was evaluated through X-ray photoelectron spectroscopy (XPS). The XRD results indicated that the films were amorphous. The SEM micrographs showed that the deposited films were homogeneous, but in some cases there were cracks. The potentiodynamic polarization technique showed that the corrosion current in the coated substrates decreased by an order of two magnitudes with respect to the uncoated substrates, but in both cases the corrosion mechanism was pitting due to the pores in the film. The XPS analysis shows that the deposited films contain both Bi3+ and Ti4+.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Materials (Basel) Ano de publicação: 2013 Tipo de documento: Article País de afiliação: Colômbia País de publicação: Suíça

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Materials (Basel) Ano de publicação: 2013 Tipo de documento: Article País de afiliação: Colômbia País de publicação: Suíça