Diamond-like carbon coatings deposited by deep oscillation magnetron sputtering in Ar-Ne discharges

Ferreira, Fábio; Serra, R.; Cavaleiro, A.; Oliveira, J.C.

doi:10.1016/j.diamond.2019.107521

Cited by 28 publications

(5 citation statements)

References 28 publications

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“…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: 57%

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: 57%

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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“…It looks like cauliflower, and is often called cauliflower-type. The formation of so-called cauliflower morphology, that is typical for films deposited by magnetron sputtering, is a consequence of the atomic shadowing effect [3]. Figure 1b exhibits that the G2 type of coating is not only compact but also smoother than the G1 type of coating, with the more uniform size of 0.1~0.5 µm.…”

Section: Morphologymentioning

confidence: 93%

“…Diamond-like carbon (DLC) is an amorphous carbon material composed of sp 2 and sp 3 hybridized carbon atoms. DLC film has attracted much attention as a versatile material owing to its excellent properties such as corrosion resistance, high mechanical hardness, high electrical insulation, high thermal conductivity, as well as its good tribological properties [1][2][3][4][5][6]. For example, Ding et al [7] deposited DLC coating on the Ti-6Al-4V substrate using the plasma-assisted chemical vapor deposition (PACVD) technique.…”

Section: Introductionmentioning

confidence: 99%

Structure and Properties of DLC Films Deposited on Mg Alloy at Different C2H2 Flows of Magnetron Sputtering Process

Sun

Cheng

2021

Coatings

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Diamond-like carbon (DLC) film is widely used due to its excellent properties, such as high hardness and high wear resistance. To investigate the advantages of DLC film applied on the surface of Mg alloy, direct current (DC) pulse magnetron sputtering was used to prepare DLC film via plasma sputtering a graphite target and introducing C2H2 gas. The silicon interlayer was fabricated by sputtering the Si target. A scanning electron microscope (SEM), transmission electron microscope (TEM), a nano-indentation instrument, an electrochemical workstation and a pin-on-disc tester were employed to obtain the surface morphology, microstructure, mechanical properties, corrosion behavior and wear resistance of the obtained film, respectively. The results show that the DLC films are dense and compact, and the structure changes from amorphous to nanocrystalline with the increase of C2H2 flow. The film prepared at low C2H2 flow has larger surface roughness, lower deposition rate, higher hardness and elasticity modulus, poorer corrosion resistance and better wear resistance, compared with the film prepared at higher acetylene flow. The self-corrosion potential of the obtained DLC film is higher than −0.95 V, the corrosion current density is 10−7 A/cm2 orders of magnitude, and the wear rate is 10−9 mm3/Nm orders of magnitude. The friction coefficient of the film is less than 0.065, the hardness is 17.3 to 22.1 MPa, and the elastic modulus is 145 to 170 MPa. The DLC films obtained on the surface of AZ91 alloy have good comprehensive properties.

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“…The columns were better defined and more continuous in the coatings richer in titanium. The surface of the coatings presented a typical granular cauliflower-like morphology related to the so-called atomic shadowing effect [51]. This effect may originate from obliquely incident atoms being preferentially deposited on the hills of the surface, and it can occur even during normal angle deposition.…”

Section: Morphological Chemical and Structural Analysismentioning

confidence: 98%

New Nanoscale Multilayer Magnetron Sputtered Ti-Dlc/Dlc Coatings with Improved Mechanical Properties

Haneef¹,

Evaristo²,

Morina

et al. 2023

Preprint

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Diamond-like carbon coatings deposited by deep oscillation magnetron sputtering in Ar-Ne discharges

Cited by 28 publications

References 28 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

Structure and Properties of DLC Films Deposited on Mg Alloy at Different C2H2 Flows of Magnetron Sputtering Process

New Nanoscale Multilayer Magnetron Sputtered Ti-Dlc/Dlc Coatings with Improved Mechanical Properties

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