A study of the electrochemical and tribological properties of TiN/CrN nano-layer coating deposited on carburized-H13 hot-work steel by Arc-PVD technique

Mohammadi

Molaei

et al. 2022

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This study aims to investigate how the predeposition machining processes such as magnetic grinding, turning machining, and wire electrical discharge machining can influence the surface properties including electrochemical and tribological behavior of TiCrN nanostructured coating applied on Mo40 steel substrate. A physical vapor deposition technique using cathodic arc evaporation was used to apply the coating. The crystallographic phases and the microstructure of the coating were studied by X-ray diffraction and scanning electron microscope, respectively. Rockwell-C, electrochemical impedance spectroscopy and potentiodynamic polarization, and pin-on-disk wear tests were employed to evaluate the adhesion strength, corrosion behavior, and tribological property of specimens, respectively. The electrochemical results after 24 h of exposure to 3.5 wt% NaCl solution showed that TiCrN coating pretreated with a turning process with polarization resistance of about 3525.32 Ω.cm 2 had the best corrosion resistance among all specimens. This was because of the improvement of the smoothness, surface quality, and adhesion after the turning process. On the other, the friction coefficient of the grounded sample is less than that of other ones. This is probably due to its higher adhesion strength and higher surface smoothness.

Section: Resultsmentioning

confidence: 96%

The effect of substrate surface integrity on the surface properties of TiCrN coating applied via the CAE‐PVD method

Mohammadi

Molaei

et al. 2022

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“…Alloying Cr with another metal results in the formation of (Cr,X)N ternary coatings by incorporating X into the CrN coating and is able to improve the gross performance of the coatings. AlCrN exhibits a considerable increase in hardness and wear resistance as aluminum content increases, which is why AlCrN coating is desirable in protective coating applications 16–19 . The Al–Cr–N system is known as a semi‐stable solid solution that is usually synthesized close to the AlN's solubility in the CrN lattice with a cubic structure 20,21 .…”

Section: Introductionmentioning

confidence: 99%

The post‐annealing effect on tribological and corrosion behaviors of CrN/AlCrN multilayered coating applied by CAE‐PVD

Lotfi‐Khojasteh

Nouri

et al. 2023

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The present study investigated the wear and electrochemical behaviors of CrN/AlCrN multilayered coatings post‐annealed at 300, 450, and 600°C temperatures. The cathodic arc evaporation technique has been utilized to deposit the coatings. Scanning electron microscope, field emission SEM, energy‐dispersive X‐ray, grazing incidence X‐ray diffraction, and Rockwell‐C indenter methods were used to characterize the coatings and to investigate the interdiffusion between the multilayered CrN/AlCrN and the H13 base metal. The results showed that the sharp interface of the CrN and AlCrN layers was blurred by the annealing process supporting the interdiffusion of the layers. The reciprocating wear test and the microhardness tester were used to evaluate the coatings’ mechanical behavior. The hardness and roughness of the coatings were increased by increasing the post‐annealing temperature. The smallest wear rates were observed for the samples treated at 300 and 450°C, which were approximately 17 times and 12 times smaller than the wear rate of the sample annealed at 600°C. Electrochemical testing was used to study the corrosion behavior of the coatings. The results showed that by increasing annealing temperature, corrosion resistances of the coatings are improved. As a result, the corrosion current density of the 600°C annealed coating was approximately 434 times smaller than as‐deposited coatings.

“…25,26 PVD coatings have found their way into the industry for several applications. 27 Today, one of the methods of PVD (Arc-PVD) that is widely used on an industrial scale is the cathodic arc evaporation process that provides a hard protective coating on cutting tools, dies, mechanical parts, etc. The Arc-PVD method has the potential to form high-quality layers surely because of its high-energy arc discharges.…”

Section: Introductionmentioning

confidence: 99%

“…In order to increase the life of the tools, hard coatings are applied by chemical vapor deposition and physical vapor deposition (PVD) 25,26 . PVD coatings have found their way into the industry for several applications 27 . Today, one of the methods of PVD (Arc‐PVD) that is widely used on an industrial scale is the cathodic arc evaporation process that provides a hard protective coating on cutting tools, dies, mechanical parts, etc.…”

Section: Introductionmentioning

confidence: 99%

Correlation between nanoindentation response and wear characteristics of CrN‐based coatings deposited by an Arc‐PVD method

Poorzal

Mazaheri

2022

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The examination of the existing relationships between nanoindentation responses and tribological properties of the nanostructured CrN, Cr(CN), and (CrTi)N coatings was the matters to be considered in this research. A cathodic arc physical vapor deposition machine was therefore implemented to apply the chosen coatings on the DIN 1.2510 tool steel substrate. Moreover, an X‐ray diffraction and a field emission scanning electron microscope were utilized in order to show the features regarding microstructure and morphology of these very coatings. The mechanical and tribological behavior of the coatings was expected to be assessed with the use of a nanoindentation and pin‐on‐disc wear tests. According to the obtained result, the wear resistance and hardness value of the (CrTi)N coating were proved to be much better than those of the CrN and Cr(CN). Linear equations were proposed between wear rate/hardness and friction coefficient/hardness to evaluate the correlation between mechanical and tribological properties. The presence of a quadratic equation between the friction coefficient and the plastic deformation index was also discovered.