Plasma electrolytic oxidation of titanium in a phosphate/silicate electrolyte and tribological performance of the coatings
By S. Aliasghari, P. Skeldon, G. Thompson. 2014
175 citations recorded by the source corpus.
Abstract Plasma electrolytic oxidation of titanium has been investigated using a phosphate/silicate electrolyte with a square waveform and a frequency of 50 Hz. A range of constant rms current densities, duty cycles and negative-to-positive current ratios was employed. The resultant coatings were examined by analytical scanning and transmission electron microscopies and X-ray diffraction. The coatings, which were limited in thickness to ∼40 to 50 μm, contained anatase, rutile, Ti 2 O 5 and silicon-rich, amorphous material. The tribological behaviour was investigated using a ball-on-disc test, revealing a coefficient of friction against steel of ∼0.8, which reduced to ∼0.4 by incorporation of ptfe particles from the electrolyte. However, due to the composition and morphology of the coatings, their wear life was relatively short.
Subfields: Aerospace Engineering, Biomaterials, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/f103a6ace099aa095617aad706ea6945d42542bb
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Citations in the corpus
- Plasma electrolytic oxidation coatings with particle additions – A review (2016, background): “In the case of process parameters, various investigations have been performed to optimize the electrical conditions, such as applied voltage/current magnitude, mode, frequency and duty cycle [8-12].”