Please use this identifier to cite or link to this item: https://physrep.ff.bg.ac.rs/handle/123456789/748
Title: Characterization of oxide coatings formed on tantalum by plasma electrolytic oxidation in 12-tungstosilicic acid
Authors: Petković-Benazzouz, Marija 
Stojadinović, Stevan 
Vasilić, Rastko 
Zeković, Ljubiša 
Keywords: 12-Tungstosilicic acid;Plasma electrolytic oxidation (PEO);Silicate tungsten bronze;Tantalum
Issue Date: 1-Oct-2011
Journal: Applied Surface Science
Abstract: 
Oxide coatings were formed on tantalum by plasma electrolytic oxidation (PEO) process in 12-tungstosilicic acid. The PEO process can be divided into three stages with respect to change of the voltage-time response. The contribution of electron current density in total current density during anodization results in the transformation of the slope of voltage-time curve. The surface morphology, chemical and phase composition of oxide coatings were investigated by AFM, SEM-EDX, XRD and Raman spectroscopy. Oxide coating morphology is strongly dependent of PEO time. The elemental components of PEO coatings are Ta, O, Si and W. The oxide coatings are partly crystallized and mainly composed of WO 3 , Ta 2 O 5 and SiO 2 . Raman spectroscopy showed that the outer layer of oxide coatings formed during the PEO process is silicate tungsten bronze. © 2011 Elsevier B.V. All rights reserved.
URI: https://physrep.ff.bg.ac.rs/handle/123456789/748
ISSN: 0169-4332
DOI: 10.1016/j.apsusc.2011.07.055
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