Investigation of the Influence of Microdroplets on the Coatings Nanolayer Structure

Grigoriev, Sergey N.; Vereschaka, Alexey; Milovich, Filipp; Sitnikov, Nikolay; Andreev, Nikolay; Bublikov, Jury; Sotova, Catherine; Sadov, Ilya

doi:10.3390/coatings10121204

Cited by 13 publications

(3 citation statements)

References 75 publications

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“…These surface characteristics significantly influence the mechanical and tribological properties of the surface, as they act as stress concentrators, impacting crack behavior. Cracks can initiate or propagate around sub-micron-sized defects and can be associated with droplets of micrometric sizes [ 22 , 36 , 37 , 38 , 39 ]. The cross-sections of the coatings, illustrated in Figure 2 d–f, display a dense columnar growth pattern typical of ceramic coatings such as TiN.…”

Section: Resultsmentioning

confidence: 99%

TiNbN Hard Coating Deposited at Varied Substrate Temperature by Cathodic Arc: Tribological Performance under Simulated Cutting Conditions

et al. 2023

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This study focused on investigating the adhesion and tribological properties of niobium-doped titanium nitride (TiNbN) coatings deposited on D2 steel substrates at various substrate temperatures (Ts) under simulated cutting conditions. X-ray diffraction confirmed the presence of coatings with an FCC crystalline structure, where Nb substitutes Ti atoms in the TiN lattice. With increasing Ts, the lattice parameter decreased, and the crystallite material transitioned from flat-like to spherical shapes. Nanoindentation tests revealed an increase in hardness (H) with Ts, while a decrease in the elastic modulus (E) resulted in an improved elastic strain limit for failure (H/E) and plastic deformation resistance (H3/E2), thereby enhancing stiffness and contact elasticity. Adhesion analysis showed critical loads of ~50 N at Ts of 200 and 400 °C, and ~38 N at Ts of 600 °C. Cohesive failures were associated with lateral cracking, while adhesive failures were attributed to chipping spallation. The tribological behavior was evaluated using a pin-on-disk test, which indicated an increase in friction coefficients with Ts, although they remained lower than those of the substrate. Friction and wear were influenced by the surface morphology, facilitating the formation of abrasive particles. However, the absence of coating detachment in the wear tracks suggested that the films were capable of withstanding the load and wear.

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Section: Resultsmentioning

confidence: 99%

TiNbN Hard Coating Deposited at Varied Substrate Temperature by Cathodic Arc: Tribological Performance under Simulated Cutting Conditions

et al. 2023

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“…In many machine elements such as gear wheel surface, bolts, trunnions, shafts, pin bearings, the desired wear and crushing resistance is achieved by hardening only the surface layer, the thickness of which is mostly 0.1-2 mm, while the inner parts remain tough. [1][2][3][4] Surface hardening is one of the main ways to increase the wear resistance of parts and frictional units. In industry, there are more than a hundred methods of surface hardening, but not all have found industrial application.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Surface Hardening Processes Applied to AISI 5140 Steel withSide Load Test

Çığır,

Eser,

Göğer

et al. 2024

International Journal of Automotive Science and Technology

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While the vehicle suspension system parts perform the functions expected from them, the surfaces of the parts areexposed to higher stress and higher abrasive forces compared to theinterior parts. Materials have surface strengthlimits. When the stress and abrasive forces to which the parts are exposed exceed the surface strength limit, cracksoccur on the part surfaces. As the stress and forces on the part increase, the part is damaged by breaking. AISI 5140 Reclamation steel is generally preferred for the joints in the vehicles. This steel is a material with hightoughness. Its usage areas are very wide. Parts such as automobile and engine parts, axle sleeve, front axle,steeringshaft, crankshaft, bolts, nuts and joints can be given as examples of usage areas. It is also a suitable material for surfacehardening processes. The purpose of the surface hardening process is to increase the wear resistance of the surfacesexposed to wear, as well as to increase the fatigue life of the part and increase the corrosion resistance. Since the innerparts of the parts are not affected by surface hardening, the resistance against impacts is increased and thus crackformation on the surface is delayed. Fatigue life is extended by delaying crack formation on the surface. In this study,the comparison of a part with induction surface hardening, which is one of the methods in which the chemical com-position of the surface is not changed, apart with nitration, which is one of the methods in which the chemical com-position of the surface is changed, and a part without any surface hardening, with the side load test, which is a statictest method. subject taken.The results from the tests applied to the samples were interpreted.According to the resultsobtained, the sample with the highest durability rate is the sample that has been surface hardened by induction.

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“…Disposition of the microdroplets is technically difficult and the equipment is costly. Fortunately, it was found that the average size and number of microdroplets increased with increasing the cathode arc current, gas pressure, and cathode target temperature [8], which is still acceptable in practice if the size is not too large.…”

Section: Introductionmentioning

confidence: 99%

The effect of cathode arc current on the structures of TiN thin films prepared by cathodic arc deposition

Honglertkongsakul,

Choeysuppaket,

Khwansungnoen

et al. 2023

J. Phys.: Conf. Ser.

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The titanium nitride (TiN) thin films were fabricated by the cathodic arc deposition technique. The effect of titanium cathode arc current on structural, chemical, and morphological properties of thin films was investigated by X-ray diffraction(XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscope (FESEM) and atomic force microscopy (AFM), respectively. The XRD results showed titanium nitride formation with a fcc phase structure for all samples and the preferred orientation changed from (111) to (200) plane with increasing the cathode arc current from 50 to 60 A. The crystallized sizes of the thin films increased as increasing the cathode arc current. In addition, the relationship between the size of the microdroplets on the coating surfaces and the arc current was examined.

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Investigation of the Influence of Microdroplets on the Coatings Nanolayer Structure

Cited by 13 publications

References 75 publications

TiNbN Hard Coating Deposited at Varied Substrate Temperature by Cathodic Arc: Tribological Performance under Simulated Cutting Conditions

TiNbN Hard Coating Deposited at Varied Substrate Temperature by Cathodic Arc: Tribological Performance under Simulated Cutting Conditions

Comparison of Surface Hardening Processes Applied to AISI 5140 Steel withSide Load Test

The effect of cathode arc current on the structures of TiN thin films prepared by cathodic arc deposition

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