SEM, EDS and XPS Analysis of the Coatings Obtained on Titanium after Plasma Electrolytic Oxidation in Electrolytes Containing Copper Nitrate

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  • Additional Information
    • Publication Information:
      MDPI AG, 2016.
    • Publication Date:
      2016
    • Collection:
      LCC:Technology
      LCC:Electrical engineering. Electronics. Nuclear engineering
      LCC:Engineering (General). Civil engineering (General)
      LCC:Microscopy
      LCC:Descriptive and experimental mechanics
    • 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.
    • File Description:
      electronic resource
    • ISSN:
      1996-1944
    • Relation:
      http://www.mdpi.com/1996-1944/9/5/318; https://doaj.org/toc/1996-1944
    • Accession Number:
      10.3390/ma9050318
    • Accession Number:
      edsdoj.b0b2c84e6e684fd2a774ca5466c26fe4