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

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 С2H4 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.

Two-Layer Nanocomposite TiC-Based Coatings Produced by a Combination of Pulsed Cathodic Arc Evaporation and Vacuum Electro-Spark Alloying

“…Earlier, we demonstrated that the introduction of Eu 2 O 3 into the electrode composition leads to the increase in their strength [32], coating growth rate [33], mechanical/tribological properties, and corrosion resistance of the coatings [34,35]. The introduction of additional carbon, for example, from a reactive atmosphere, and the formation of diamond-like carbon allow one to reduce the friction coefficient and enhance the corrosion resistance of coatings [32]. Sputtering of the upper diamond-like carbon (DLC) layer on the arc-deposited base TiC coatings increased the hardness and elastic modulus by 60% and 20%, respectively [36].…”

“…The introduction of ZrO 2 , Al 2 O 3 , NbC, WC, and other additives into TiC-Ni and TiC-NiCr electrodes allows one to increase the coating growth rate, hardness, and heat resistance as well as to decrease the coefficient of friction [2]. Earlier, we demonstrated that the introduction of Eu 2 O 3 into the electrode composition leads to the increase in their strength [32], coating growth rate [33], mechanical/tribological properties, and corrosion resistance of the coatings [34,35]. The introduction of additional carbon, for example, from a reactive atmosphere, and the formation of diamond-like carbon allow one to reduce the friction coefficient and enhance the corrosion resistance of coatings [32].…”

Ultrasonic Sensors-Assisted Corrosion Studies on Surface Coated AlSi9Cu3 Alloy Die Castings

“…In this research work, the corrosion protection large surfaces in a marine environment. Moreover, the work in [21] discussed the coatings deposited via pulsed cathodic arc evaporation (PCAE) of a TiC-NiCr-Eu 2 O 3 cathode fabricated by the powder metallurgy method. The deposition was carried out in different gas media, including Ar, N 2 , and C 2 H 4 .…”

Tribological Characteristics and Corrosion Resistance of Coatings Obtained by Electrospark Alloying, Pulsed Cathodic Arc Evaporation, and Hybrid Technology Using TiCNiCr and TiCNiCr–Dy2O3 Electrodes

“…Ранее нами было показано, что введение Eu 2 O 3 в состав электродов TiCNiCr позволяет повысить их прочностные характеристики [11], скорость роста покрытий [12], а также механические и трибологические свойства покрытий [13]. В настоящей работе были увеличены (в 4 раза) концентрации хрома и никеля по сравнению с предыдущими исследованиями.…”

“…В настоящей работе были увеличены (в 4 раза) концентрации хрома и никеля по сравнению с предыдущими исследованиями. Перспективным для нанесения покрытий является метод импульсного катодно-дугового испарения [12] с использованием данных электродов, впервые предложенный в работе [14].…”