Abstract
The possibility of production of Ti-, N-, and C-containing superhard coatings on a metal substrate by a plasma-dynamic method in air is studied. The coating is deposited in the time of one short operating cycle of a magnetoplasma accelerator under the impact of a high speed electric discharge Ti-containing plasma jet on the substrate surface. Formation of TiN and TiCN nanostructured layers in the coating structure is ascertained with the help of the SEM and X-ray diffraction methods and it leads to the coating hardness increasing. Formation of a gradient layer of mixed material at the coating/substrate interface is found to occur under the action of a high-enthalpy plasma jet on a metal substrate. The value of hardness is not constant throughout the coating thickness, and ultrahigh nanohardness values >20 GPa were obtained for the subsurface layer and substrate/coating interface region. The mean value of hardness of the coating is 16.2 GPa. The coating produced has good adhesion with the substrate.
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Original Russian Text © A.A. Sivkov, D.Yu. Gerasimov, 2017, published in Fizika i Khimiya Obrabotki Materialov, 2017, No. 3, pp. 33–37.
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Sivkov, A.A., Gerasimov, D.Y. Plasma Deposition of Ti–C–N Coatings in Air. Inorg. Mater. Appl. Res. 9, 433–436 (2018). https://doi.org/10.1134/S2075113318030292
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DOI: https://doi.org/10.1134/S2075113318030292