The friction and wear performance of DLC coatings deposited on plasma nitrided AISI 4140 steel by magnetron sputtering under air and vacuum conditions

Kovacı, H.; Baran, Özlem; Yetim, A.F.; Bozkurt, Y.B.; Kara, Levent; Çelik, A.

doi:10.1016/j.surfcoat.2018.05.084

Cited by 51 publications

(24 citation statements)

References 50 publications

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“…Despite the tremendous progress of anti-reflective coatings of well-aligned one-dimensional nanostructures, such as carbon nanotubes, or 2D velvet-like carbon [8], a much simpler solution using amorphous carbon films (a-C) has also been shown to reduce reflection from the near UV to IR broadband spectrum [9][10][11]. Such a solution has the advantage that it is straightforward to implement in industrial thin film deposition [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Low resistivity amorphous carbon-based thin films employed as anti-reflective coatings on copper

et al. 2020

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Amorphous carbon-based coatings deposited on copper substrates by magnetron sputtering at different target-to-substrate distances were investigated. Films deposited at short distances as 2 cm presented the best results in terms of morphology, density, and resistivity. Ultraviolet near-infrared range spectrometry measurements determined total reflectance and ellipsometry, extinction coefficient, refraction index, and pseudo bandgap. Amorphous carbon films of 150 nm deposited at 2 cm reduced the total reflectance by up to 60 ± 5% in the near-infra-red range when compared to pure copper films. The addition of Fe*boosts the absorption of the coating reducing the total reflectance by up to 70 ± 5% in near-infrared. (Fe*: deposited from stainless-steel target used in direct-current magnetron sputtering). Also, it reduces the electrical resistivity by a factor of 100 compared to that of pure amorphous carbon films. The reduction in total reflectance induced by the presence of the amorphous carbon-based films on copper depends, as expected, on light penetration depth and the absorption coefficient.

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Section: Introductionmentioning

confidence: 99%

Low resistivity amorphous carbon-based thin films employed as anti-reflective coatings on copper

et al. 2020

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“…Thus, deposited films require mechanical support to be provided by the substrate material, granting good adhesion and avoiding the so-called "eggshell effect" 6,7 . Hardness gradients built-up by duplex treatments is common to ensure good adhesion, and plasma nitriding has been reported as a load carrying improving treatment, providing a better support to hard and brittle coatings [7][8][9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Dependence of Wear and Mechanical Behavior of Nitrocarburized/CrN/DLC Layer on Film Thickness

et al. 2019

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Diamond-like carbon (DLC) films are amorphous metastable carbon form that provide interesting mechanical and tribological properties. The role of film thickness influence upon wear and mechanical properties is of interest and not yet fully reported. In this study, two samples of previously plasma nitrocarburized, quenched and tempered H13 steel were duplex treated. First, a physical vapor deposition (PVD) chromium nitride (CrN) layer was applied, followed by a top final diamond-like carbon layer applied by plasma-enhanced chemical vapor deposition (PECVD). To evaluate thicknesses influence on mechanical and wear properties of coatings, samples were treated using two different thicknesses of both layers. In this study, the thickest CrN and DLC case presented higher hardness and better tribological properties, however, its failure occurs in brittle fashion.

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“…When the wear tests of steels are examined in the literature, the coefficient of friction changes between 0.5 -0.7 [42,43,44] and this shows that this study is consistent with the literature. On the other hand, surface investigators such as Kovaci et al [16], Cuao-Moreu et al [45], Teng et al [46] and He et al [47] have studied the tribological properties of metal specimens by coating different metal surfaces with different materials, temperature, time and method. The reason for the serious decrease in wear rate is the wear resistance of the hard coating layer on the surface of the material [48][49][50].…”

Section: Wear Propertiesmentioning

confidence: 99%

“…Although stainless steels exhibit high corrosion resistance, low surface hardness is a major disadvantage, especially when exposed to wear, and it is important to improve the tribological and mechanical properties of their surfaces. In recent years, researchers have been working extensively on various coating techniques such as Pysical Vapor Deposition (PVD) [10][11][12], Diamond-like Carbon (DLC) [13][14][15][16][17], Plasma Nitriding [18][19][20], Boronizing [21][22][23] to increase surface hardness through surface modification.…”

Section: Introductionmentioning

confidence: 99%

Examination of Wear and Rockwell-C adhesion Properties of Nitronic 50 Steel Coated with Pack Boriding Method

Mertgenç

2020

Sakarya University Journal of Science

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The Nitronic 50 steel is a nitrogen containing stainless steel, which has a high corrosion resistance, and high strength but its surface resistance against wear is low, making it extremely limited to use in areas subject to wear. In this study, in order to improve the material surface and to investigate its effect on tribological properties, boronizing process was carried out by used pack boriding method at 850 ° C, 900 ° C and 950 ° C for 4 hours. As a result of coating process, the boride layer has a smooth and flat structure in SEM investigations, the coating thickness varies between 9 µm and 36 µm and the boride layer thickness increases with increasing temperature. While the hardness of the uncoated material was around 250 HV0.05, the surface hardness of the material reached up to 1.712 HV0.05 with the coating process and increased about 7 times. According to XRD analysis, the surface of the coating layer consisted of phases FeB, CrB, Ni3B, Fe2B, Cr2B and MnB. Wear behavior was performed by ball-on-disk wear test in dry environment. The friction coefficient and wear rate decreases with increasing temperature, while the wear resistance is increased by 20 times compared to unboronized sample. When the wear tracks were examined, the uncoated Nitronic 50 had an adhesive wear mechanism, on the other hand the boronized samples had an adhesive and abrasive wear mechanism together. The Rockwell-C adhesion test was carried out under a load of 1.471 N and the resulting surface damages were evaluated according to the quality map. Boronized steel at 850 °C is defined as HF3 type, at 900 °C and 950 °C at boronized steel it is defined as HF4 type and adhesion is acceptable.

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The friction and wear performance of DLC coatings deposited on plasma nitrided AISI 4140 steel by magnetron sputtering under air and vacuum conditions

Cited by 51 publications

References 50 publications

Low resistivity amorphous carbon-based thin films employed as anti-reflective coatings on copper

Low resistivity amorphous carbon-based thin films employed as anti-reflective coatings on copper

Dependence of Wear and Mechanical Behavior of Nitrocarburized/CrN/DLC Layer on Film Thickness

Examination of Wear and Rockwell-C adhesion Properties of Nitronic 50 Steel Coated with Pack Boriding Method

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