Surface characterization and electrochemical properties of tantalum nitride (TaN) nanostructured coatings produced by reactive DC magnetron sputtering

Int J Applied Ceramic Tech

Mohammadi

Molaei

et al. 2022

Self Cite

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: Methodsmentioning

confidence: 99%

Section: Electrochemical and Tribological Evaluationsmentioning

confidence: 99%

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

Int J Applied Ceramic Tech

Mohammadi

Molaei

et al. 2022

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“…In the electrical circuit shown in Figure 13 (a), Rs is the solution resistance, R 1 load transfer resistance and the fixed phase element CPE 1 is related to the double electric layer. Also, in Figure 13(b), Rs is the solution strength, R 2 TiN/CrN coating resistance, R 1 load transfer resistance, the fixed phase element CPE 2 to TiN/CrN coating and the fixed phase element CPE 1 is related to the double electric layer [49][50][51][52].…”

Section: Eis Testmentioning

confidence: 99%

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

Lotfi‐Khojasteh

Sahebazamani

Journal of Asian Ceramic Societies

et al. 2020

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The purpose of this study is to investigate the tribological and corrosion behavior of TiN/CrN nanostructured multilayer coating on H13 carburized hot-work tool steel. Pack cementation and cathodic arc physical vapor deposition (Arc-PVD) techniques were employed to apply adiffused layer and ahard coating, respectively. FE-SEM and XRD were used for coating characterization. Apin-on-disc wear test and Rockwell Cindenter were employed to study wear behavior and adhesion of the coating. To evaluate the corrosion behavior of the specimens, the specimens were tested by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) after immersion in 3.5% sodium chloride solution for 48 hours. The results of potentiodynamic polarization and EIS curves showed that the TiN/CrN nanolayer coating with apre-carburized treatment demonstrated abetter corrosion behavior than H13 and carburized samples. According to the electrochemical test, the current density of the substrate, carburized, and pre-carburized TiN/CrN coated samples were 1.070, 0.875, 0.487 µA/ cm 2 , respectively. This improvement in corrosion resistance is due to the high density of the TiN/CrN nano-layers coating that prevents the diffusion of the corrosion solution into the substrate.

“…Besides, carbon, nitrogen, hydrogen, and oxygen can react with Tantalum to produce very firm compounds like TaN which augment Ta refractory capability. 15,16 As a popular technique of physical vapor deposition (PVD), magnetron sputtering (MS) is widely utilized to deposit a lot of materials (specifically nitride coatings). [17][18][19][20][21][22] This technique is utilized for increasing the deposition rate.…”

Section: Introductionmentioning

confidence: 99%

“…Ta has a really dependent on carbon, nitrogen, hydrogen, and oxygen that can form a solid solution containing Ta. Besides, carbon, nitrogen, hydrogen, and oxygen can react with Tantalum to produce very firm compounds like TaN which augment Ta refractory capability 15,16 …”

Section: Introductionmentioning

confidence: 99%

Studying the in vitro corrosion response of nanostructured TaN coatings in Hank's physiological solution

Babaei

Fattah‐alhosseini

Int J Applied Ceramic Tech

et al. 2021

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The goal of this research is to determine the effect of N 2 pressure to argon pressure on the microstructural analysis and corrosion behavior of nanostructured TaN deposited coatings using a reactive DC-magnetron sputtering (RDCMS) technique.The samples coated microstructure was studied by the X-ray diffraction (XRD) and scanning electron microscope (SEM), and elemental distribution was studied using energy-dispersive X-ray spectroscopy (EDS). To investigate the corrosion behavior of nanostructured TaN coatings, the potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) tests were performed in Hank's physiological solution. The results of different tests revealed that the coating with a content of 17.6% P N2 /P Ar consisted of hexagonal and orthorhombic TaN phases and had denser microstructure and free pores. This coating showed superior corrosion behavior in comparison to the other ones. Also, the corrosion resistance of this coating raised by increasing the time of immersion from 48 to 168 h.