Nanoindentation and nanoscratch behaviors of DLC films growth on different thickness of Cr nanolayers

Shahsavari, Fatemeh; Ehteshamzadeh, Maryam; Naimi-Jamal, Mohammad Reza; Irannejad, Ahmad

doi:10.1016/j.diamond.2016.10.003

Cited by 34 publications

(22 citation statements)

References 32 publications

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“…Thick DLC films are generated when thicker interlayer are deposited, however, thick DLC films presented higher surface roughness and friction coefficient than thin films 13 . A similar result was reported using Cr as interlayer 14 , presenting a not linear correlation between interlayer thickness and DLC thickness. Therefore, soft film are produced from the onset where the film gets thick enough to lower hardness and wear properties [13][14][15] .…”

Section: Introductionsupporting

confidence: 86%

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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Section: Introductionsupporting

confidence: 86%

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

et al. 2019

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“…The properties of such coatings are directly related to the hybridization state of carbon bonds and the hydrogen content. The combination of chemical inertness, low friction coefficient, high hardness, and good wear resistance make DLC films very suitable for a wide variety of biomedical [2][3][4][5][6][7][8][9], mechanical [10][11][12][13] and tribological applications [14][15][16][17][18][19][20]. However, the high compressive stress, which limits the thickness of coatings, represents a main disadvantage of DLC coatings.…”

Section: Introductionmentioning

confidence: 99%

Structure, Mechanical and Tribological Properties of Me-Doped Diamond-Like Carbon (DLC) (Me = Al, Ti, or Nb) Hydrogenated Amorphous Carbon Coatings

2018

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Metal containing hydrogenated diamond-like carbon coatings (Me-DLC, Me = Al, Ti, or Nb) of 3 ± 0.2 μm thickness were deposited by a magnetron sputtering-RFPECVD hybrid process in an Ar/H2/C2H2 mixture. The composition and structure were investigated by Energy Dispersive X-ray Spectroscopy (EDS), X-ray Diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The residual stress was measured using the curvature method and nanoindentation was used to determine the hardness and the Young’s modulus. A Ball-on-disk tribometer was employed to investigate the frictional properties and sliding wear resistance of films. The results show that the properties depend on the nature and the Me content in the coatings. The doping of the DLC coatings leads to a decrease in hardness, Young’s modulus, and residual stresses. Wear rate of the films first decreases with intermediate Me contents and then increases for higher Me contents. Significant improvements in the friction coefficient on steel as well as in the wear rate are observed for all Al-DLC coatings, and, concerning the friction coefficient, the lowest value is measured at 0.04 as compared to 0.07 for the undoped DLC.

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“…After that, surface activation was achieved, too. A Cr interlayer (~ 300 nm) was deposited between multilayers and substrate to enhance their adhesion strength [35]. Three targets (two Cr targets and one graphite target) were placed side by side to prevent cross-contamination of the target material.…”

Section: Film Depositionmentioning

confidence: 99%

Enhancement in the tribological properties of Cr/DLC multilayers in methane: structural transformation induced by sliding

et al. 2019

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Diamond-like carbon (DLC) films respond as a lubricating material under some atmosphere conditions, such as N 2 , moisture. Nevertheless, incomplete knowledge about the key factors, which control the performances of film under distinct gases, limits the further use of them. Herein, the tribological properties of DLC film and Cr/DLC multilayers with different modulation periods were studied under methane. Frictional tests conducted under methane show that Cr/ DLC film exhibits a great reduction in friction and wear compared to that of DLC film. An interpretation for tribological performances of films was proposed by considering repassivation and structural transformation taking place at the sliding interface. It is chemical passivation that plays a major role in the tribological properties of DLC film, while the Cr/ DLC multilayers possess the lower friction coefficient because of the structural transformation induced by shearing. This study is important for broadening applications of DLC film in the industrial field and reducing energy waste.

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Nanoindentation and nanoscratch behaviors of DLC films growth on different thickness of Cr nanolayers

Cited by 34 publications

References 32 publications

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

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

Structure, Mechanical and Tribological Properties of Me-Doped Diamond-Like Carbon (DLC) (Me = Al, Ti, or Nb) Hydrogenated Amorphous Carbon Coatings

Enhancement in the tribological properties of Cr/DLC multilayers in methane: structural transformation induced by sliding

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