A Review on Tribological Study of DLC Coatings in Combination with Bio Based Lubricants

Hanif, Muhammad Talha; Zahid, Rehan; Mufti, Riaz Ahmad; Waqas, Muhammad; Naveed, Tehreem

doi:10.11648/j.ijmsa.20211003.13

Cited by 3 publications

(2 citation statements)

References 91 publications

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“…These issues are also described in a number of publications [30,31]. These are coatings with different characteristics, as pointed out by Casais et al [32]: "CrN/CrCN/DLC multilayered coatings presented a better overall wear behavior, whereas B 4 C coating showed a good wear behavior regarding the load". Among the carbon coatings characterized by favorable tribological properties, there are coatings doped with tungsten, i.e., a-C:H:W (W-incorporated hydrogenated DLC) coatings.…”

Section: Introductionmentioning

confidence: 91%

Tribological Properties of a Sliding Joint with an a-C:H:W Coating under Lubrication Conditions with PAO8 Oil and the Addition of 2% MoS2 Nanoparticles

Hadło,

Lubas,

Szczypinski-Sala

et al. 2024

Materials

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One of the promising methods for improving the durability and reliability of friction joints in combustion engines is the use of thin and hard coatings, including coatings based on amorphous DLC. The a-C:H:W coating was produced using the commercial PVD method. The tested tribological joints were made of AISI 4337 steel and SAE-48 bearing alloy (conformal contact) and AISI 4337 steel and valve shims (non-conformal contact). The contact area was lubricated with SAE 5W40 engine oil and PAO8 oil + 2 wt.% MoS2 nanoparticles. The objective of this work is to explore the influence of PAO8 + MoS2 on the tribological properties of a sliding joint with an a-C:H:W coating and the change in the properties of the oils. In the conformal contact, the lubrication of the a-C:H:W coating with PAO8 + MoS2 caused a significant increase in the friction resistance (than in) as compared to the joints with a quenching and tempering surface layer and lubricated SAE 5W40, while in the non-conformal contact, the lubrication of the a-C:H:W coating with PAO8 + MoS2 caused a decrease in the friction resistance and temperature of the contact area. The joints with the a-C:H:W coating were characterized by higher wear of the SAE-48 bearing alloy, as compared to the joints with the surface layer without coating (lubricated with SAE 5W40 oil—11-fold increase, PAO8 + MoS2—46-fold increase). The wear of valve shims with the a-C:H:W coating was significantly lower as compared to the wear of the commercial version of the valve shims (the difference between joints lubricated with SAE 5W40 oil and PAO8 + MoS2 was 12%, 36% and 29% for unit pressures of 10, 15 and 20 MPa). Lubrication of the a-C:H:W coating with PAO8 oil + MoS2 protected the sliding joints against seizing in non-conformal contact.

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Section: Introductionmentioning

confidence: 91%

Tribological Properties of a Sliding Joint with an a-C:H:W Coating under Lubrication Conditions with PAO8 Oil and the Addition of 2% MoS2 Nanoparticles

Hadło,

Lubas,

Szczypinski-Sala

et al. 2024

Materials

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“…Numerous research papers in the past few years have explored the frictional characteristics of DLC films in various settings [90]. The primary method by which DLC films typically control friction involves the formation of a transfer film, which then facilitates easy shear sliding within the interfacial material.…”

Section: Friction and Wearmentioning

confidence: 99%

Recent Progress on the Tribology of Pure/Doped Diamond-like Carbon Coatings and Ionic Liquids

Shaikh,

Sadeghi,

Cruz

et al. 2024

Coatings

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This review provides a comprehensive overview of recent advances in tribology concerning pure/doped diamond-like carbon coatings (DLCs) and ionic liquid (ILs) interaction. DLC coatings are often used in industrial machinery and processes where sliding occurs between surfaces, leading to wear and degradation of their surfaces. DLC coatings are optimized by adjusting operating and deposition parameters as well as doping them with other elements to improve performance, such as thermal stability and chemical resistance. ILs are a promising green lubricant option due to their low melting temperature, superior thermal stability, and high miscibility with organic substances. ILs have been studied as neat lubricants and additives, and their tribological properties have been investigated, including their use as extreme temperature lubricants. The tribological properties of pure/doped DLC coatings with ILs have also been explored, although limited research has been conducted in this area. The combined effect of DLCs and ILs shows great promise in reducing energy loss due to friction, promoting longevity, and conserving energy.

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Tribology Dependence of Annealed a-C:H Films in Dry Air and Methanol Environments

et al. 2022

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In the present study, we obtained a-C:H films with different nanostructures by annealing from room temperature to 400 °C. The influence of the nanostructures on tribological performance in dry air and methanol environments was investigated by a reciprocating tribometer. Our results show that the tribological performance of a-C:H films follows different rules in the two environments. In dry air, tribological properties are controlled by the transfer film and mechanical properties. In methanol, friction and wear are determined by the hydrogen bonding structure, where friction coefficients relate on saturation effects of sp3-CH, and the wear properties depend on the “collapse effect” that the more the sp3-CH3 and sp3-CH2, the easier the wear out of bulk a-C:H films. Our work provides guidance for the application of a-C:H films in the methanol environment.

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A Review on Tribological Study of DLC Coatings in Combination with Bio Based Lubricants

Cited by 3 publications

References 91 publications

Tribological Properties of a Sliding Joint with an a-C:H:W Coating under Lubrication Conditions with PAO8 Oil and the Addition of 2% MoS2 Nanoparticles

Tribological Properties of a Sliding Joint with an a-C:H:W Coating under Lubrication Conditions with PAO8 Oil and the Addition of 2% MoS2 Nanoparticles

Recent Progress on the Tribology of Pure/Doped Diamond-like Carbon Coatings and Ionic Liquids

Tribology Dependence of Annealed a-C:H Films in Dry Air and Methanol Environments

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