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Structure and Properties of Protective Coatings Deposited by Pulsed Cathodic Arc Evaporation in Ar, N2, and C2H4 Environments using the TiC–NiCr–Eu2O3 Cathode

Scientific-educational Center of SHS, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
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Coatings 2019, 9(4), 230; https://doi.org/10.3390/coatings9040230
Received: 27 February 2019 / Revised: 25 March 2019 / Accepted: 26 March 2019 / Published: 31 March 2019
(This article belongs to the Special Issue Corrosion Characterization and Surface Analysis of Metallic Materials)
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Abstract

Coatings were deposited by pulsed cathodic arc evaporation (PCAE) of a TiC–NiCr–Eu2O3 cathode fabricated by the powder metallurgy method. The deposition was carried out in different gas media, including Ar, N2, and C2H4. The structure, elemental, and phase compositions of coatings were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), Raman spectroscopy, and glow discharge optical emission spectroscopy (GDOES). Coatings were tested in terms of their hardness, elastic modulus, elastic recovery, friction coefficient, and wear and corrosion resistance. The obtained results demonstrated that the coatings deposited in Ar possessed higher hardness up to 20 GPa and an elastic recovery of 92%. Coatings produced using C2H4 showed the minimum friction coefficient (0.35 ± 0.01). The use of nitrogen as a gas medium led to the formation of coatings with the best corrosion resistance in sulfuric acid. Coatings formed in N2 had a free corrosion potential of +0.28 V and a corrosion current density of 0.012 µA/cm2. View Full-Text
Keywords: pulsed cathodic arc evaporation; TiC-based coatings; structure; hardness; friction coefficient; corrosion resistance pulsed cathodic arc evaporation; TiC-based coatings; structure; hardness; friction coefficient; corrosion resistance
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Kiryukhantsev-Korneev, P.; Sytchenko, A.; Sheveyko, A.; Vorotilo, S. Structure and Properties of Protective Coatings Deposited by Pulsed Cathodic Arc Evaporation in Ar, N2, and C2H4 Environments using the TiC–NiCr–Eu2O3 Cathode. Coatings 2019, 9, 230.

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