Improving the Wear Resistance of Thermally Sprayed Nanocomposite Cr3C2-25NiCr Coatings by Pulsed Plasma Treatment

Kovaleva, M.G.; Sirota, V.V.; Beresnev, V.M.; Tyurin, Yu.N.; Vagina, O.N.; Pavlenko, I.A.

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Title	Improving the Wear Resistance of Thermally Sprayed Nanocomposite Cr3C2-25NiCr Coatings by Pulsed Plasma Treatment
Authors	Kovaleva, M.G. Sirota, V.V. Beresnev, V.M. Tyurin, Yu.N. Vagina, O.N. Pavlenko, I.A.
ORCID
Keywords	hardmetal coating chromium carbide multi-chamber gas-dynamic accelerator pulsed plasma treatmen wear resistance
Type	Article
Date of Issue	2018
URI	http://essuir.sumdu.edu.ua/handle/123456789/71671
Publisher	Sumy State University
License	Copyright not evaluated
Citation	Improving the Wear Resistance of Thermally Sprayed Nanocomposite Cr[3]C[2]-25NiCr Coatings by Pulsed Plasma Treatment / M.G. Kovaleva, V.V. Sirota, V.M. Beresnev [et al.] // Журнал нано- та електронної фізики. - 2018. - Т.10, № 6. - 06035. - DOI: 10.21272/jnep.10(6).06035
Abstract	In this study the surfaces of thermally sprayed nanocomposite Cr3C2-25NiCr coating have been treated by the pulsed plasma. The nanocomposite Cr3C2-25NiCr coating was deposited by a new multi-chamber gas-dynamic accelerator on grit blasted steel substrate. An automatic pulse-plasma device “Impulse-6” was employed to plasma treatment the surface of Cr3C2-25NiCr coating. The microstructure and wear resistance of the surface of the nanocomposite Cr3C2-NiCr coating before and after the pulsed plasma treatment (PPT) was studied in this paper. Wear tests were carried out using a computer controlled pin-on-disc type tribometer at 25 ºC. The specific wear rate of the nanocomposite Cr3C2-25NiCr coating after PPT is approximately four times less than that of the Cr3C2-25NiCr coating before PPT, indicating that the nanocomposite Cr3C2-25NiCr coating after PPT exhibits better wear resistance. Detailed analysis indicates that the enhanced wear resistance of the nanocomposite Cr3C2-25NiCr coating after PPT is mainly attributed to the formation of an oxide tribolayer and smoother surface, which result from the dense and amorphous microstructure of the coating.
Appears in Collections:	Журнал нано- та електронної фізики (Journal of nano- and electronic physics)