Comparison of Mechanical and Tribological Properties of Nitride and Oxynitride Coatings Based on Chrome and Zirconium Obtained by Cathodic Arc Evaporation

This paper is a continuation of our previous work. The article presents an investigation of the influence of coating deposition parameters, in particular a variation with 50% of both cathodic arc current and bias voltage, on the mechanical and tribological properties of TiCN coatings deposited by the cathodic arc evaporation of metals at a constant gas ratio. The thicknesses of the coatings are measured by the Calotest method using a 30-mm hard steel ball. The determined values are in the range of 734 – 1534 nm. Surface morphology and chemical composition are estimated by a Scanning Electron Microscope (SEM) and an Energy Dispersive Spectrometer (EDS) of SEM. The determined values of nanohardness are in the range of 10 - 23 GPa and adhesion values are in the range of 28 - 70 N. Tribology of the TiCN coatings is investigated with three different load forces (3N, 5N and 8N) by the CETR UMI Multi-Specimen Test System from Bruker with an Si3N4 ball counter-body. The friction coefficient is measured in the range of 0.19 - 0.23. Coating wear and wear of the counter-body are calculated, according to the standard EN1071-13:2010, wherein the values of the latter are in the range of (2.5 - 30) x 10-6 mm3.

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Influence of Coating Process Parameters on the Mechanical and Tribological Properties of Thin Films

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.368.59 ◽

2016 ◽

Vol 368 ◽

pp. 59-63 ◽

Cited By ~ 4

Author(s):

Totka Bakalova ◽

Nikolay Petkov ◽

Tomáš Blažek ◽

Pavel Kejzlar ◽

Petr Louda ◽

...

Keyword(s):

Thin Films ◽

Scratch Test ◽

Titanium Carbonitride ◽

Test Results ◽

Continuous Increase ◽

Mechanical And Tribological Properties ◽

The Coefficient Of Friction ◽

Cathodic Arc Evaporation ◽

Arc Evaporation ◽

Cathodic Arc

Titanium carbonitride (TiCN) thin films with differing C content were deposited by cathodic arc evaporation of pure Ti in a gas composite environment of N2 and C2H2. Scanning electron microscopy (SEM), scratch test, mechanical profilometer and “ball-on-disc” tribometer methods were used to characterize the surface, the coefficient of friction (CoF) of the TiCN thin films and the evaluated wear. An increase of the C2H2 fraction in the gas environment leads to a continuous increase in the deposition rate of the TiCN thin films, as well as an increase in the adhesion of the films to the substrate and the values of the CoF. Tribological test results (when tested against Si3N4 balls) show an increase in the friction coefficient of the TiCN from 0.08 to 0.32, with increasing carbon concentration in the film. The CoF decreases rapidly to 0.06 at a C content of 20.6 at.%, N 38.4 at.% and Ti 41.0 at.%.

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

Materials ◽

10.3390/ma13030547 ◽

2020 ◽

Vol 13 (3) ◽

pp. 547 ◽

Cited By ~ 1

Author(s):

Philipp Kiryukhantsev-Korneev ◽

Alina Sytchenko ◽

Alexander Sheveyko ◽

Dmitry Moskovskikh ◽

Stepan Vorotylo

Keyword(s):

Friction Coefficient ◽

Tribological Properties ◽

Intermediate Layer ◽

Surface Defects ◽

Corrosion Current ◽

High Wear Resistance ◽

Carbon Phase ◽

Cathodic Arc Evaporation ◽

Arc Evaporation ◽

Cathodic Arc

A novel two-stage technology combining vacuum electro-spark alloying (VESA) and pulsed cathodic arc evaporation (PCAE) was approbated for the deposition of TiC-based coatings in inert (Ar) and reactive (C2H4) atmospheres. The deposition was carried out using a TiC-NiCr-Eu2O3 electrode and 5140 steel substrates. Structural, elemental, and phase compositions of the deposited coatings were investigated by scanning electron microscopy, energy-dispersive spectrometry, and X-ray diffraction. The mechanical properties of the coatings were measured by nanoindentation using a 4 mN load. The tribological properties of the coatings were measured using the pin-on-disc setup in air and in distilled water at a 5 N load. The experimental data suggest that VESA coatings are characterized by surface defects, a hardness of 12.2 GPa, and a friction coefficient of 0.4. To ensure good adhesion between the VESA coating and the upper layer containing diamond-like carbon (DLC), an intermediate layer was deposited by PCAE in the Ar atmosphere. The intermediate layer had a hardness of up to 31 GPa. The upper layer of the coating ensured a low and stable friction coefficient of 0.2 and high wear resistance due to the formation of an sp2–sp3 bound carbon phase. Multilayer TiC-based coating with the upper DLC layer, in addition to high tribological properties, was characterized by the lowest corrosion current density (12 μA/cm2).

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