Performance of diamond-like carbon coatings (produced by the innovative Ne-HiPIMS technology) under different lubrication regimes

Cardoso, F. A.; Ferreira, Fábio; Cavaleiro, A.; Ramalho, A.

doi:10.1016/j.wear.2021.203775

Cited by 12 publications

(16 citation statements)

References 23 publications

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“…This showed that the 50% Ne-DLC film not only had the lowest COF in the Stribeck curves, but it also had the highest hardness; hence, it was expected that this film also had a better wear resistance in comparison with the other films. On the other hand, the hardness of CrN was also high (20 GPa), but it had much less wear resistance in comparison with the DLC films, as was reported in the previous work [17]. This can be due to the high COF of the CrN film that resulted in higher wear rates in comparison to the DLC films, despite having a similar hardness value [29].…”

Section: Hardnessmentioning

confidence: 56%

“…Figure 2 shows the variations of the viscosity of PAO 8 oil with the temperature changes. Comparing the viscosity of this oil with the commercial engine oil (SAE 10W-40) used in the previous work [17], it was observed that PAO 8 oil has a much lower viscosity in all temperatures. This proves that PAO 8 oil is more suitable for this study to ensure contact in the boundary lubrication regime at higher temperatures.…”

Section: Lubricant Viscositymentioning

confidence: 85%

“…In previous work, the authors showed that adding Ne to the discharge gas of the recently developed variant of HiPIMS, called deep oscillation magnetron sputtering (DOMS), leads to the deposition of DLC films with a better tribological performance in the boundary lubrication regime at room temperature [17].…”

Section: Introductionmentioning

confidence: 99%

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Advanced Tribological Characterization of DLC Coatings Produced by Ne-HiPIMS for the Application on the Piston Rings of Internal Combustion Engines

et al. 2021

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Piston rings (PR) are known for almost a quarter of the friction losses in internal combustion engines. This research work aims to improve the tribological performance of PR by a recently developed variant of Diamond-like Carbon (DLC) coatings deposited in a mixture of Ar and Ne plasma atmosphere (Ne-DLC) by high-power impulse magnetron sputtering (HiPIMS). For the benchmark, the widely used Chromium Nitride (CrN) and DLCs deposited in pure Ar plasma atmosphere (Ar-DLC) were used. The tribological tests were performed on a block-on-ring configuration under different lubrication regimes by varying temperatures and sliding speeds. The analysis of the results was performed by Stribeck curves corresponding to each sample. An improvement of the tribological performance was observed for Ne-DLC films by up to 22.8% reduction in COF compared to CrN in the boundary lubrication regime, whereas, for the Ar-DLC film, this reduction was only 9.5%. Moreover, the Ne-DLC films achieved ultralow friction of less than 0.001 during the transition to a hydrodynamic lubrication regime due to better wettability (lower contact angle) and higher surface free energy. Increasing the Ne up to 50% in the discharge gas also leads to an increase of hardness of DLC films from 19 to 24 GPa.

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Section: Hardnessmentioning

confidence: 56%

Section: Lubricant Viscositymentioning

confidence: 85%

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Advanced Tribological Characterization of DLC Coatings Produced by Ne-HiPIMS for the Application on the Piston Rings of Internal Combustion Engines

et al. 2021

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“…The most used deposition techniques for DLC production are disclosed in Table 2. The given deposition technique affects the mechanical, electrical, chemical, tribological, and biological properties of DLC depending on the deposition rates, kinetic energies of carbon species, carbon precursor, or substrate (type, bias, temperature) [29,135]. Another way to tune DLC properties is by elemental doping or by producing composite films.…”

Section: Preparation Method: Physical Vapor Depositionmentioning

confidence: 99%

Overview on the Antimicrobial Activity and Biocompatibility of Sputtered Carbon-Based Coatings

et al. 2021

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Due to their outstanding properties, carbon-based structures have received much attention from the scientific community. Their applications are diverse and include use in coatings on self-lubricating systems for anti-wear situations, thin films deposited on prosthetic elements, catalysis structures, or water remediation devices. From these applications, the ones that require the most careful testing and improvement are biomedical applications. The biocompatibility and antibacterial issues of medical devices remain a concern, as several prostheses still fail after several years of implantation and biofilm formation remains a real risk to the success of a device. Sputtered deposition prevents the introduction of hazardous chemical elements during the preparation of coatings, and this technique is environmentally friendly. In addition, the mechanical properties of C-based coatings are remarkable. In this paper, the latest advances in sputtering methods and biocompatibility and antibacterial action for diamond-based carbon (DLC)-based coatings are reviewed and the greater outlook is then discussed.

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“…Performance of DLC coatings in piston ring-cylinder bore was investigated in Refs. [539,540]. Application of DLC film in methane environment [541] and the effect of DLC film on Fig.…”

Section: Carbon Filmsmentioning

confidence: 99%

A review of advances in tribology in 2020–2021

Meng

et al. 2022

Friction

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Around 1,000 peer-reviewed papers were selected from 3,450 articles published during 2020–2021, and reviewed as the representative advances in tribology research worldwide. The survey highlights the development in lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology, providing a show window of the achievements of recent fundamental and application researches in the field of tribology.

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Performance of diamond-like carbon coatings (produced by the innovative Ne-HiPIMS technology) under different lubrication regimes

Cited by 12 publications

References 23 publications

Advanced Tribological Characterization of DLC Coatings Produced by Ne-HiPIMS for the Application on the Piston Rings of Internal Combustion Engines

Advanced Tribological Characterization of DLC Coatings Produced by Ne-HiPIMS for the Application on the Piston Rings of Internal Combustion Engines

Overview on the Antimicrobial Activity and Biocompatibility of Sputtered Carbon-Based Coatings

A review of advances in tribology in 2020–2021

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