Amorphous Carbon Coatings for Low Friction and Wear in Bucket Tappet Valvetrains

Schamel, Andreas; Grischke, M.; Bethke, Reinhold

doi:10.4271/970004

Cited by 17 publications

(8 citation statements)

References 11 publications

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“…3). Some of the engine parts and assemblies which showed improved tribological performance after depositing DLC coatings include fuel injection system, 13,35,36 piston assembly, [37][38][39] bearings, 40,41 valve train assembly, [42][43][44][45][46][47][48] and gears. 49,50 Because of their biocompatibility and outstanding material properties such as high hardness, low friction, corrosion resistance, and moderate wear of counterbodies, DLC coatings found number of applications in the field of biomedical engineering.…”

Section: Applications Of Dlc Coatingsmentioning

confidence: 99%

Influence of intrinsic and extrinsic conditions on the tribological characteristics of diamond-like carbon coatings: A review

et al. 2016

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Tribological performance of industrial applications involving boundary lubrication regime can be improved by depositing surface coatings such as diamond-like carbon (DLC) on the interacting surfaces. DLCs are considered as hard coatings with unique combination of properties which results in minimizing the friction induced energy and material losses especially under starved lubrication conditions. In spite of high wear-resistance and ultralow friction coefficients, there are a lot of factors that can directly influence the tribological characteristics of DLC coatings. Although, many studies were conducted to comprehend the effects of intrinsic/extrinsic conditions on tribological behavior of these coatings, still there is a lack of understanding due to contradictory remarks. Therefore, there is a need to rearrange the published data in an organized manner for logical continuation of research. In this paper, a brief introduction of DLC coatings is presented followed by detailed discussion on conditions that can directly influence their tribological properties.

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Section: Applications Of Dlc Coatingsmentioning

confidence: 99%

Influence of intrinsic and extrinsic conditions on the tribological characteristics of diamond-like carbon coatings: A review

et al. 2016

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“…Friction under lubricated conditions is a complex process depending on the type of lubricant, additives, coating type, operating temperature and contact conditions. Generally, compared to steel, the most DLC based coatings reduce the friction coefficients under lubricated conditions [137,40,150].…”

Section: Classification and Properties Of Dlc Coatingsmentioning

confidence: 99%

Surface technology for automotive engineering

et al. 2009

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“…Wear of machinery components can be reduced by depositing coatings on the surfaces in contact and by applying lubricants [1,2]. Although many critical components (for instance in aeronautic and automotive industry) use coatings [3,4], due to the fact that most lubricant producers have developed their products such as to optimize their tribological behavior on substrates, separate studies are necessary to examine the specific lubricant-coating pair behavior [5], [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of debris size on the tribological performance of thermally sprayed coatings

Habib

Cano

Heredia

et al. 2020

Tribology International

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This research aims to assess the effect of the debris particle size on the tribological performance and lubrication regime parameters of a Ni-based alloy coating. This is a key industrial problem, and its resolution can contribute to better machine endurance and proper maintenance. The debris particles are simulated by hard Al 2 O 3 particles of size ranging from nanometers to 45 μm and dispersed in an oil lubricant. The coating studied is NiCrBSi deposited by flame spraying technique followed by the Surface Flame Melting (SFM) process. The counterpart disk sample was fabricated from quenched and tempered F-5220 steel (in line with A681(O1) ASTM). This pair was tested under linear sliding contact. Our results show that the addition of alumina particles contributes to a significant increase in wear, particularly for the largest particles (micrometric size). In the case of micrometric particles, it is possible to observe the formation of higher surface roughness, numerous microgrooves, and plastic flow of NiCrBSi coating perpendicular to the sliding direction, resulting in higher loss of volume. It was found that the actual surface roughness (obtained as a function of the debris particle size) allows better identification and prediction of the lubrication regime for wear processes instead of the traditional approach that uses the initial surface roughness as a parameter.

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Amorphous Carbon Coatings for Low Friction and Wear in Bucket Tappet Valvetrains

Cited by 17 publications

References 11 publications

Influence of intrinsic and extrinsic conditions on the tribological characteristics of diamond-like carbon coatings: A review

Influence of intrinsic and extrinsic conditions on the tribological characteristics of diamond-like carbon coatings: A review

Surface technology for automotive engineering

Effect of debris size on the tribological performance of thermally sprayed coatings

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