1. Hard wearproof PEO-coatings formed on Mg alloy using TiN nanoparticles
- Author
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Konstantine V. Nadaraia, Andrey S. Gnedenkov, Sergey V. Gnedenkov, Dmitry V. Mashtalyar, Alexander Yu. Ustinov, Sergey L. Sinebryukhov, and I.M. Imshinetskiy
- Subjects
Materials science ,Alloy ,General Physics and Astronomy ,chemistry.chemical_element ,macromolecular substances ,02 engineering and technology ,Electrolyte ,engineering.material ,010402 general chemistry ,01 natural sciences ,chemistry.chemical_compound ,X-ray photoelectron spectroscopy ,Magnesium alloy ,Magnesium ,technology, industry, and agriculture ,Surfaces and Interfaces ,General Chemistry ,Plasma electrolytic oxidation ,equipment and supplies ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Titanium nitride ,0104 chemical sciences ,Surfaces, Coatings and Films ,chemistry ,Chemical engineering ,engineering ,0210 nano-technology ,Tin - Abstract
In order to increase the hardness and wearproof of magnesium alloy parts it is necessary to use protective coatings. These surface layers were formed by plasma electrolytic oxidation (PEO) in the electrolyte containing nanosized particles of titanium nitride. X-ray photoelectron spectroscopy and Raman spectroscopy showed the presence of TiN, TiOxNy, and TiO2 compounds in the composition of the PEO-layer. Oxidation of TiN in TiOxNy and TiO2 was realized during the PEO treatment. It has been shown that the best protective mechanical properties are attributed to the coatings formed in electrolytes with TiN concentrations of 2–3 g/l. Mechanical properties of the obtained layers have been studied. It has been established that the hardness of nanoparticles-containing coatings is twofold higher in comparison with the PEO-coating formed in the base electrolyte; its wear resistance increases in 2.2 times. Thus, the incorporation of TiN nanoparticles into the composition of the PEO-coating improves significantly mechanical properties of the surface of magnesium alloys. This, in turn, makes it possible to expand the field of application of these materials in such industries as aviation, automotive, development of high-tech products and devices.
- Published
- 2020
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