Abscheidung superharter Kohlenstoffschichten mittels Laser‐Arco® auf dem Weg vom Labor in die industrielle Serienfertigung

Scheibe, H.‐J.; Leonhardt, M.; Leson, Andreas; Meyer, Carl‐Friedrich; Stucky, T.; Weihnacht, Volker

doi:10.1002/vipr.200800370

Cited by 8 publications

(3 citation statements)

References 4 publications

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“…The 3-µm thick ta-C coatings were deposited on polished 100Cr6 steel substrates (62 HRC) after the deposition of a chrome adhesion layer. The adhesion layer was deposited in a DC-sputtering process and the ta-C coating by means of laser-controlled pulsed arc technology (Laser-Arc) at a deposition temperature below 100 • C (Scheibe et al [21]). Additionally, plasma filtering was used, which reduces the roughness because fewer droplets reach the sample during deposition.…”

Section: Preparation Of Ta-c Coatingsmentioning

confidence: 99%

Ultra-Low Friction on Tetrahedral Amorphous Diamond-Like Carbon (ta-C) Lubricated with Ethylene Glycol

et al. 2018

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Lubricated tetrahedral amorphous carbon coatings can show a very complex tribological behavior. In particular, friction regimes with extremely low friction have been observed. In tribological experiments with a ta-C/steel friction pair that was lubricated with ethylene glycol, we observed a sudden and very strong decrease in the effective friction coefficient from 0.45 to 0.01 after running-in. By varying different components of the tribological system after this abrupt decrease we investigated the role of the counter-body, the lubricant and the coating. To investigate the surface chemistry, static time-of-flight secondary ion mass spectrometry (ToF-SIMS), dynamic secondary ion mass spectrometry (SIMS), and X-ray photoelectron spectroscopy (XPS) measurements were performed. Using deuterated lubricants, ToF-SIMS measurements allowed us to distinguish adsorption of hydrogen and hydroxyl-groups from the lubricant from the adsorption from the environment. Deuterated hydroxyl-groups from the lubricant adsorbed to the surface during the experiment. In particular, more adsorbed deuterated hydroxyl-groups were detected prior to the sudden decrease in the friction coefficient. Thus, the sudden decrease in the coefficient of friction was most likely caused by an interplay between the lubricant, the ta-C coating and the counter-body which lead to the formation of transfer and adsorption layers.

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Section: Preparation Of Ta-c Coatingsmentioning

confidence: 99%

Ultra-Low Friction on Tetrahedral Amorphous Diamond-Like Carbon (ta-C) Lubricated with Ethylene Glycol

et al. 2018

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“…Pocket shape Trapezoidal Figure 3. Image of pocketed compression ring [14]. Untampered plasma coating has a number of benefits, such as improving the adhesion and wetting of surfaces.…”

Section: Parameters Valuementioning

confidence: 99%

“…Many researchers have focused on diamond-like carbon coatings (DLC) that are known to have a low propensity for tribochemical reactions and adhesive wear. In general, these properties result in a lower coefficient of friction compared to the metallic layer or hard coatings [14]. Plasma coatings for application on piston rings have also been investigated and promising results have been reported [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Untampered Plasma Coating and Surface Texturing on Friction and Running-in Behavior of Piston Rings

Akbarzadeh

Khonsari

2018

Coatings

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The running-in behavior and the associated transient friction characteristics of a piston ring with different surface treatments are experimentally evaluated using a custom-made engine testing apparatus. Results are reported for a series of running-in and steady-state experiments on piston rings with different combinations of coated and textured surfaces. Comparisons are provided between five different types of piston rings: (1) with no textures; (2) with textures only; (3) with coating only; (4) first textured and then coated; and (5) first coated and then textured. A combination of the texturing and coating showed 12.5% improvement in the frictional behavior and up to 50% improvement in break-in time compared to cases when only one surface treatment was applied.

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Diamantartige Kohlenstoffschichten steigern die Effizienz

et al. 2015

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Steigende Energiepreise sowie zunehmende Folgen des Klimawandels aufgrund der Emission von Treibhausgasen haben die Notwendigkeit zum Energiesparen in den letzten Jahren verstärkt in das öffentliche Bewusstsein gerückt. Für den Einsatz als reibungsmindernde Beschichtung eignen sich insbesondere kohlenstoffbasierte Beschichtungen, die auch DLC‐Schichten genannt werden (DLC = diamond‐like carbon). Dabei sind vor allem wasserstofffreie DLC‐Beschichtungen, die als ta‐C‐Schichten bezeichnet werden, von Interesse, da diese im Vergleich zu Standard‐DLC‐Schichten eine nochmals deutlich gesteigerte Härte und damit Verschleißfestigkeit aufweisen. Zudem zeichnen sich diese Schichten in Kombination mit speziellen Schmierstoffen durch einen teilweise extrem niedrigen Reibungskoeffizienten aus. Die Erzeugung von ta‐C‐Beschichtungen erfolgt aufgrund ihrer besonderen Eigenschaften mit PVD‐Verfahren. So lassen sie sich mit einem lasergesteuerten gepulsten Bogenverfahren, dem sogenannten Laser‐Arc‐Verfahren, herstellen. Dieses zeichnet sich durch eine vergleichsweise hohe Beschichtungsrate sowie eine gute Langzeitstabilität aus und eignet sich daher auch für einen Einsatz in der industriellen Produktion.

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Abscheidung superharter Kohlenstoffschichten mittels Laser‐Arco® auf dem Weg vom Labor in die industrielle Serienfertigung

Cited by 8 publications

References 4 publications

Ultra-Low Friction on Tetrahedral Amorphous Diamond-Like Carbon (ta-C) Lubricated with Ethylene Glycol

Ultra-Low Friction on Tetrahedral Amorphous Diamond-Like Carbon (ta-C) Lubricated with Ethylene Glycol

Effect of Untampered Plasma Coating and Surface Texturing on Friction and Running-in Behavior of Piston Rings

Diamantartige Kohlenstoffschichten steigern die Effizienz

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