Friction and wear performance of multilayered a-C:H:Al coatings

Kilman, L.; Jaoul, Cédric; Colas, Maggy; Tristant, Pascal; Dublanche-Tixier, Christelle; Laborde, Etienne; Meunier, Frédéric; Jarry, O.

doi:10.1016/j.surfcoat.2015.07.079

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…High hardness would prevent from wear due to high carrying capacity under the action of high‐speed friction testing. As a result, lower RMS, the relatively high content of sp 3 fraction, and hardness were important factors to the low‐friction coefficient and wear rate for the (Cr,Ce)/a‐C:H film compared to Cr/a‐C:H film in ambient air condition . As analyzed by above XPS, AFM, and mechanical properties, (Cr,Ce)/a‐C:H film owned relatively higher content of sp 3 fraction, lower RMS, and higher hardness compared to Cr/a‐C:H film.…”

Section: Resultsmentioning

confidence: 92%

Exploiting carbon-based (Cr,Ce)/a-C:H nanocomposite film on cemented WC

Zhou

Liu

Wang

2017

Surf Interface Anal

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Cemented tungsten carbide (WC) has widely served in modern industry because of its outstanding characteristics, while it could suffer from severely wear both under ambient air and water environments. To exploit a novel carbon-based film should be a feasible way to modify the surface of cemented WC and overcome these shortcomings. In the present study, the Cr/Ce co-incorporated (Cr,Ce)/a-C:H carbon-based film was successfully deposited on cemented WC. The microstructure and mechanical properties of films were systematically characterized, and their tribological behaviors were tested in ambient air and deionized water environment. The results showed that (Cr,Ce)/a-C:H film dominated by the typical amorphous structure and the doping Cr existed with the metallic Cr nanocrystallites as well as Ce formed CeO 2 . The (Cr,Ce)/a-C:H film could possess good mechanical performances, which could own higher hardness, elastic module, low internal stress, and better adhesive strength. Especially, the as-prepared (Cr,Ce)/a-C:H film could present relatively lower friction coefficient and wear rate compared to uncoated cemented WC both under ambient air and deionized water environment, indicating that the Cr/Ce co-doped (Cr,Ce)/a-C:H film could be an effective method to modify the surface of cemented WC so as to improve the friction and wear performances of cemented WC materials.

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Section: Resultsmentioning

confidence: 92%

Exploiting carbon-based (Cr,Ce)/a-C:H nanocomposite film on cemented WC

Zhou

Liu

Wang

2017

Surf Interface Anal

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“…Therefore, the materials that can be used as substrate in the CVD process are limited because their properties can be altered at elevated temperatures in some cases (e.g., polymers and some metals). There are also some studies have reported using a combination of both CVD and PVD processes to fabricate multilayer coatings [30,31].…”

Section: Deposition Methodsmentioning

confidence: 99%

“…Detailed analysis revealed the formation of a tribofilm, which was believed to be responsible for the relatively low wear in the case of DLC/Ni and DLC/Ti multilayer coatings (counterpart: 6 mm steel ball; load: 1 N). Kilman et al [31] utilized Al in hydrogenated amorphous carbon (a-C:H:Al) to fabricate a multilayer coating on AISI M2 high-speed steel. It was found that even though the inclusion of Al lowered the mean hardness value compared to pure a-C:H coatings, the frictional behavior was improved.…”

Section: Other Materialsmentioning

confidence: 99%

Tribology of multilayer coatings for wear reduction: A review

et al. 2017

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Friction and wear phenomena encountered in mechanical systems with moving components are directly related to efficiency, reliability and life of the system. Hence, minimizing and controlling these phenomena to achieve the desired system performance is crucial. Among the numerous strategies developed for reducing friction and wear, coatings have been successfully utilized in various engineering applications to mitigate tribological problems. One of the benefits of coatings is that they may be fabricated using a variety of materials in several different forms and structures to satisfy the requirements of the operating conditions. Among many types, coatings that are comprised of a combination of materials in the form of a multilayer have been gaining much interest due to the added degree of freedom in tailoring the coating property. In this paper, the properties and development status of multilayer coating systems for tribological applications were reviewed with the aim to gain a better understanding regarding their advantages and limitations. Specifically, focus was given to Ti-based and Cr-based coatings since Ti and Cr were identified as important elements in multilayer coating applications. Emphasis was given to materials, design concepts, mechanical properties, deposition method, and friction and wear characteristics of these types of coatings.

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