Study of tribological performance of ECR–CVD diamond-like carbon coatings on steel substrates

Zhou, Zhifeng; Li, K.Y.; Bello, I.; Lee, C.S.; Lee, S.T.

doi:10.1016/j.wear.2004.10.005

Cited by 76 publications

(36 citation statements)

References 35 publications

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“…Thus, subsequently reduces the temperature required for initiation of graphitisation and accelerate the graphitisation process [48,49]. Estimation of the phase transformation temperature for DLC coating has also been reported elsewhere [39,50] showing the important role of contact pressure on structural changes of a-C:15H.…”

Section: Eqmentioning

confidence: 79%

“…In the actual analysis, the ratio of the intensity between the D and G peaks is considered to characterize the structure of the a-C:15H coating, rather than considering the overall intensity taken from one location to other.It is reported that the relative intensity height of the D peak is related to the microcrystalline size of the graphitic cluster, where lessgraphitic amorphous films have a lower H D /H G value [40][41][42][43]. Therefore, higher values of the H D /H G ratio imply transformation of the a-C:15H coating into graphite in the a-C:15H matrix under the present boundary-lubricated conditions [39].…”

Section: Coating Wear Analysismentioning

confidence: 80%

“…Raman spectroscopy has been used as a technique to characterize DLC coatings, and their wear debris in the literature [37][38][39]. Renishaw inVia Raman microscope was used to analyze the structural modifications in the wear tracks of the a-C:15H…”

Section: Coating Wear Analysismentioning

confidence: 99%

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Tribological performance and tribochemical processes in a DLC/steel system when lubricated in a fully formulated oil and base oil

Kosarieh

Morina

Lainé

et al. 2013

Surface and Coatings Technology

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Abstract:Diamond-like carbon (DLC) coatings show extremely good promise for a number of applications in automotive components as they exhibit excellent tribological properties such as low friction and good wear resistance. This can impact on improved fuel economy and durability of the engine components. Much work has been reported on the dry sliding of DLC coatings with less so in lubricated contacts and, as such, there is a need to further understand the tribochemistry of lubricated DLC contacts. Commercially-available oils are normally optimized to work on ferrous surfaces. Previous studies on DLC lubricated contacts have tended to use model oil systems rather than fully formulated lubricants and from this an interesting picture of lubrication mechanisms is emerging. Optimising compatibility between a surface and a set of lubricant additives may lead to excellent durability (wear) as well as increased fuel economy (low friction). In this work, the friction and wear properties of a DLC coating under boundary lubrication conditions have been investigated and the tribological performance compared with that of an uncoated steel system. A pin-on-plate tribotester was used to run the experiments using High speed steel (HSS) M2 grade plates coated with 15 at.% hydrogenated DLC (a-C:15H) sliding against cast iron pins. A Group III mineral base oil, fully synthetic Group IV PAO and four different fully formulated oils were used in this study. Furthermore optical and scanning electron microscopes (SEM) were used to observe the wear scar and to assess the durability of the coatings. Energy-Dispersive X-ray analysis (EDX), X-ray Photoelectron Spectroscopy (XPS) and Raman spectroscopy analyses were performed on the tribofilms to understand the tribochemical interactions between oil additives and the a-C:15H coating.This study show that the durability of the a-C:15H coating strongly depends on the selected additive package in the oils. In addition the effect of detergent, dispersant and antioxidants on the performance of the Molybdenum-based friction modifier (Mo-FM) and ZDDP anti-wear additive were investigated and results are reported in this paper.

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Section: Eqmentioning

confidence: 79%

Section: Coating Wear Analysismentioning

confidence: 80%

See 1 more Smart Citation

Tribological performance and tribochemical processes in a DLC/steel system when lubricated in a fully formulated oil and base oil

Kosarieh

Morina

Lainé

et al. 2013

Surface and Coatings Technology

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“…This indicates that GMO suppressed the progression of graphitization of the ta-C film under lubricated condition. These results can be explained by the high contact temperature and phase transformation temperature of DLC films [35][36][37]. It is assumed that the contact temperature reached to high temperature which caused graphitization of the ta-C film.…”

Section: Discussionmentioning

confidence: 99%

In Situ Raman Observation of the Graphitization Process of Tetrahedral Amorphous Carbon Diamond-Like Carbon under Boundary Lubrication in Poly-Alpha-Olefin with an Organic Friction Modifier

et al. 2017

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The graphitization process of a tetrahedral amorphous carbon (ta-C) film under lubrication was investigated using a laboratory-built in situ Raman tribometer. The coating was lubricated with poly-alpha-olefin (PAO), PAO with an added friction modifier (FM), glycerol mono-oleate (GMO). Friction tests were carried out using a ball-on-disk setup, in which a 19-mm diameter ta-C-coated ball was loaded and rubbed against a steel disk that was immersed in a lubricant solution. In situ optical microscopy and Raman spectroscopy were used to monitor the graphitization process and wear tracks of the ta-C-coated ball. Raman analysis was conducted on the rubbed surface of the rotating ta-C-coated ball when it was located under an objective lens every three minutes during sliding. In this study, the degree of graphitization of the ta-C surface was estimated by calculating the intensity ratio of the D-peak and G-peak (ID/IG) in the Raman spectra of the ta-C film during friction tests with different lubricants. All our results suggest that the friction modifier inhibits the progression of graphitization of DLC films by reducing friction, in other words, reducing the contact temperature, and the wear progression of DLC films under boundary lubrication can be induced by graphitization of DLC surfaces at the sliding contact.

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“…DLC films exhibit excellent tribological properties [1][2][3][4]; however, the practical applications of DLC coating have some limitations due to their low adhesion to aluminum alloy in general [5]. In order to improve the adhesiveness of the DLC coating, the use of metallic and/or non metallic interlayers has been explored.…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Aluminum Alloy treated by Fine Particle Peening/DLC Hybrid Surface Modification

Amano

Nanbu

Kameyama

et al. 2010

EPJ Web of Conferences

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Abstract. In order to improve the adhesiveness of the DLC coating, Fine Particle Peening (FPP) treatment was employed as pre-treatment of the DLC coating process. FPP treatment was performed using SiC shot particles, and then AA6061-T6 aluminum alloy was DLC-coated. A SiC-rich layer was formed around the surface of the aluminum alloy by the FPP treatment because small chips of shot particles were embedded into the substrate surface. Reciprocating sliding tests were conducted to measure the friction coefficients. While the DLC coated specimen without FPP treatment showed a sudden increase in friction coefficient at the early stage of the wear cycles, the FPP/DLC hybrid treated specimen maintained a low friction coefficient value during the test period. Further investigation revealed that the tribological properties of the substrate after the DLC coating were improved with an increase in the amount of Si at the surface.

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Study of tribological performance of ECR–CVD diamond-like carbon coatings on steel substrates

Cited by 76 publications

References 35 publications

Tribological performance and tribochemical processes in a DLC/steel system when lubricated in a fully formulated oil and base oil

Tribological performance and tribochemical processes in a DLC/steel system when lubricated in a fully formulated oil and base oil

In Situ Raman Observation of the Graphitization Process of Tetrahedral Amorphous Carbon Diamond-Like Carbon under Boundary Lubrication in Poly-Alpha-Olefin with an Organic Friction Modifier

Tribological Properties of Aluminum Alloy treated by Fine Particle Peening/DLC Hybrid Surface Modification

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