Tribological behavior of diamond-like carbon thin films deposited by the pulse laser technique at different substrate temperatures

Salah, Numan; Alshahrie, Ahmed; Iqbal, Javed; Hasan, P.M.Z.; Abdel-wahab, M. Sh.

doi:10.1016/j.triboint.2016.07.013

Cited by 36 publications

(15 citation statements)

References 26 publications

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“…In general, PLD carbon film thickness is in the range of hundreds of nm. As examples, Salah et al [35] report a film thickness in the range of 270 nm, Gayathri et al [36] obtained 500 nm thick films, Constantinou et al [37] synthesized 125 nm films, and in this work, 100 nm thin films are reported.…”

Section: Discussionsupporting

confidence: 52%

“…Salah et al [35] tested the morphology and roughness of DLC films that were synthesized between 100-500 • C, and observed that the increase of temperature determines the transformation of film inherent nanostructures of into clusters. This phenomenon determines a gradual roughening of films, graphitization, and high values of the friction coefficient.…”

Section: Discussionmentioning

confidence: 99%

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An Experimental Study on Nano-Carbon Films as an Anti-Wear Protection for Drilling Tools

et al. 2017

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Carbon thin films of 50-100 nm thickness were synthesized by Pulsed Laser Deposition in vacuum at different laser fluences from 2 to 6 J/cm 2 . The deposited films were characterized by Raman spectroscopy for compositional assessment, scanning electron microscopy for morphology/thickness evaluations, and X-ray reflectivity for density, thickness, and roughness determinations. The films were~100 nm thin, smooth, droplet-free, made of a-C:H type of diamond-like carbon. The mechanical properties of synthesized films were studied by nanoindentation and adhesion tests. The films that were obtained at low laser fluences (2, 3 J/cm 2 ) had better mechanical properties as compared to those synthesized at higher fluences. The mean values of hardness were around 20 GPa, while the friction coefficient was 0.06. The deposition conditions of carbon thin films that displayed the best mechanical properties were further used to coat commercial drills. Both uncoated and coated drills were tested on plates that were made of three types of steel: Stainless steel 304, general use AISI 572 Gr 65 steel (OL60), and AISI D3 tool steel (C120). All of the drill edges and tips were studied by optical and scanning electron microscopes. The coated samples were clearly found to be more resistant, and displayed less morphological defects than their uncoated counterparts when drilling stainless steel and OL60 plates. In the case of C120 steel, carbon coatings failed because of the high friction between drill and the metal plate resulting in tip edges blunting that occurred during processing.

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Section: Discussionsupporting

confidence: 52%

Section: Discussionmentioning

confidence: 99%

An Experimental Study on Nano-Carbon Films as an Anti-Wear Protection for Drilling Tools

et al. 2017

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“…The G, D and 2D bands of these graphitic materials were observed at their regular positions at 1575, 1340 and 2680 cm À1 respectively. [25][26][27] The RPM breathing mode of SWCNT is also shown at 142 cm À1 . 28 These results conrm that these carbon nanomaterials have perfect structures.…”

Section: Resultsmentioning

confidence: 91%

Carbon nanotubes of oil fly ash as lubricant additives for different base oils and their tribology performance

et al. 2017

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Oil fly ash has been reported to be a good source for the production of carbon nanotubes (CNTs). Recently, these CNTs were evaluated as lubricant additives in sunflower base oil and were found to exhibit excellent tribological properties. In this work, these CNTs were tested as lubricant additives in 100SN, 500SN and 150BS Saudi Aramco base oils. The results on other commercial carbon nanostructures like multiwall and single wall CNTs and graphene are also included in this study for comparison. Excellent tribological performance was obtained with CNTs of fly ash at a very small concentration. The observed reduction in values of the friction coefficient between two metallic surfaces using these CNTs was found to be superior to those of other carbon nanomaterials. The value of the friction coefficient was reduced by around 20% at a concentration of 0.1 wt%. These values were also investigated as a function of load, speed and temperature. The rheological behaviour showed that the viscosity of the 0.1 wt% CNTsimpregnated 500SN oil is almost invariant compared to that of the pure one. It is therefore suggested that CNTs of fly ash may be a good lubricant additive to minimize the friction and improve the fuel economy.

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“…Regarding the adhesion of the coatings, an increase of the critical load necessary for film failure was reported at temperatures above 300 °C. The tribological behaviour of carbon-based thin films deposited at different temperatures (from 100 to 500 °C) was presented by Numan Salah et al [22]. The authors reported that as the temperature rises, the morphology of the films changes significantly.…”

Section: Introductionmentioning

confidence: 99%

“…The authors reported that as the temperature rises, the morphology of the films changes significantly. The particle size grows from 10 nm to 30 nm and the surface roughness increases, resulting in higher friction coefficients and wear rates [22]. The adhesion of soft and thick carbon-based films was also studied [23,24], and it was reported to be improved by a nitriding process [23,25].…”

Section: Introductionmentioning

confidence: 99%

Deposition temperature influence on the wear behaviour of carbon-based coatings deposited on hardened steel

Feldiorean

Cristea

Țierean

et al. 2019

Applied Surface Science

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An evaluation regarding the influence of substrate material characteristics and deposition parameters on the tribological behaviour of carbon-based is presented. Chromium nitride interlayers and carbon-based thin films were deposited on hardened AISI 5115 case hardening steel, by magnetron sputtering. The physical vapour deposition (PVD) deposition was performed at three different temperatures: 180 °C, 200 °C and 250 °C. The chemical composition of the samples was assessed by Rutherford Backscattering Spectroscopy (RBS), the structure by X-ray Diffraction (XRD), and the surface morphology by Atomic Force Microscopy (AFM). The surface chemistry was analysed by X-ray Photoelectron Spectroscopy (XPS) and Raman Spectroscopy. The coatings are homogeneous, amorphous, with a smooth surface. The mechanical behaviour has been assessed on a pin-on disk rotational tribometer (wear characteristics), on a micro scratch tester (adhesion to the substrate), by ball-cratering (film thickness); by nanoindentation (hardness and the modulus of elasticity). A strong correlation between the substrate characteristics, but more importantly, of the deposition temperature, on one hand, and the mechanical characteristics, on the other hand, has been observed. The fracture toughness is positively influenced by the presence of the ceramic interlayer (chromium nitride). The modulus of elasticity and friction coefficient (both in dry conditions and lubricated) are decreased for higher deposition temperatures, however the higher deposition temperature negatively affects the hardness of the steel substrate.

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Tribological behavior of diamond-like carbon thin films deposited by the pulse laser technique at different substrate temperatures

Cited by 36 publications

References 26 publications

An Experimental Study on Nano-Carbon Films as an Anti-Wear Protection for Drilling Tools

An Experimental Study on Nano-Carbon Films as an Anti-Wear Protection for Drilling Tools

Carbon nanotubes of oil fly ash as lubricant additives for different base oils and their tribology performance

Deposition temperature influence on the wear behaviour of carbon-based coatings deposited on hardened steel

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