sem, eds and xps analysis of the coatings obtained on titanium after plasma electrolytic oxidation in electrolytes containing copper nitrate
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2016
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Abstract
In the paper, the Scanning Electron Microscopy (SEM) with Energy Dispersive X-ray Spectroscopy (EDS) and X-ray Photoelectron Spectroscopy (XPS) results of the surface layer formed on pure titanium after plasma electrolytic oxidation (micro arc oxidation) at the voltage of 450 V are shown. As an electrolyte, the mixture of copper nitrate Cu(NO3)2 (10–600 g/L) in concentrated phosphoric acid H3PO4 (98 g/mol) was used. The thickness of the obtained porous surface layer equals about 10 μm, and it consists mainly of titanium phosphates and oxygen with embedded copper ions as a bactericidal agent. The maximum percent of copper in the PEO surface layer was equal to 12.2 ± 0.7 wt % (7.6 ± 0.5 at %), which is the best result that the authors obtained. The top surface layer of all obtained plasma electrolytic oxidation (PEO) coatings consisted most likely mainly of Ti3(PO4)4∙nH3PO4 and Cu3(PO4)2∙nH3PO4 with a small addition of CuP2, CuO and Cu2O.
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rokosz2016materialssem,
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| Authors | ;Krzysztof Rokosz;Tadeusz Hryniewicz;Dalibor Matýsek;Steinar Raaen;Jan Valíček;Łukasz Dudek;Marta Harničárová |
| Journal | Nature Materials |
| Year | 2016 |
| DOI |
10.3390/ma9050318
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