Adhesion and friction performance of DLC/rubber: The influence of plasma pretreatment

Chun, Bai; Gong, Zhenbin; An, Liwei; Li, Qiang; Zhang, Junyan; Yushkov, G. Yu.; Nikolaev, A.; Shandrikov, M. V.; Zhang, Bin

doi:10.1007/s40544-020-0436-6

Cited by 25 publications

(14 citation statements)

References 38 publications

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“…This is because DLC can provide a C tribochemical layer for wear in the scuffing process, slowing the wear of the cylinder liner. This phenomenon agrees with several previous studies [27,28]. In summary, when the chrome-plated cylinder liner mated with GDC, the scuffing process included fatigue wear transfered to the adhesive, but in the case of DLC, fatigue wear was the only wear mode.…”

Section: Scuffing Mechanism Of Gdc and Dlc Mating With Cr Linersupporting

confidence: 92%

Tribological performance and scuffing behaviors of several automobile piston rings mating with chrome-plated cylinder liner

Huang

Yuan

et al. 2021

Friction

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The friction and wear properties, as well as the scuffing resistance, of different piston-ring coatings mating with a chrome-plated cylinder liner were investigated. Interrupted wear tests under the lubricant starvation condition were conducted to examine the wear behavior of Cr-diamond coating (GDC) and diamond-like coating (DLC). The results indicated that the DLC coating had outstanding tribological properties (small coefficient of friction and wear loss) at 150 °C, while the GDC coating exhibited better performance at an elevated temperature (240 °C). The DLC coating had a better scuffing resistance; no material adhesion occurred for 70 min under the unlubricated condition. The interrupted wear behaviors revealed that the scuffing process of the GDC coating involved the consumption of lubricant oil with relatively stable wear, a reduction in the friction force, and the occurrence of scuffing, in sequence. In contrast, although the friction force also increased after a short period of weak friction, no scuffing was observed. This is attributed to the formation of a mixed oxide and graphitic C tribolayer.

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Section: Scuffing Mechanism Of Gdc and Dlc Mating With Cr Linersupporting

confidence: 92%

Tribological performance and scuffing behaviors of several automobile piston rings mating with chrome-plated cylinder liner

Huang

Yuan

et al. 2021

Friction

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“…In C 1s, the photoelectron peak at 284.8 eV proves the existence of CC, CH and CC, and the photoelectron peak at 286.3 is CO and COH. [ 31 ] In O 1s, the photoelectron peak at 532.5 is COH and CO. [ 32 ] The XPS results prove that the plasma treatment under air atmosphere produces some oxygen‐containing functional groups on the surface of silica, and the bonding grafting between Si69 and silica.…”

Section: Resultsmentioning

confidence: 99%

An animal glycerol potassium salt without volatile organic compounds emission combined with plasma‐atomization technology and its application in green tires

Xiao

Gong

et al. 2023

Polymer Composites

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In this study, a VOC‐free animal glycerol potassium salt is introduced to replace the silane coupling agent, and the plasma is used to treat the modifier and silica. The impact of high‐energy electrons in the plasma increases the contact area between the modifier and silica. Combined with the atomization technology, the velocity difference realizes the microscopic dispersion of silica, the instantaneous thin‐layer drying reduces the oxidation of the rubber chains. XPS and SEM show that the plasma promotes the silanization reaction of silica. FTIR demonstrates that the existence of chemical bonds and hydrogen bonds between potassium oleate (PO) and silica, and there is a crosslinking between PO and sulfur. The PO/Si69‐silica/NR composites prepared by plasma‐atomization technology have better processing fluidity, mechanical properties and lower rolling resistance. The plasma‐atomization technology promotes the silanization reaction of silica, saves energy consumption and reduces dust pollution, meanwhile, the replacement of Si69 by PO reduces VOC emissions and the rolling resistance of the rubber, which provides an innovative idea for the development of green tires.

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“…DLC films have the characteristics of high hardness and chemical inertness. They can be deposited not only on the traditional metal matrix, but also on the rubber matrix to improve the self-lubricating properties of the matrix [14]. However, the thermal hybridization of C-C bonds, relaxation of the structure, and graphitization transition have been demonsctrated to occur once the working temperature exceeds 200 °C, which increases the friction coefficient of DLC films and drastically reduce their service life.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of thermoviscoelasticity driven solid-liquid interface reducing friction for polymer alloy coating

et al. 2023

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High-temperature ablation is a common failure phenomenon that limits the service life of the transmission parts on heavy-duty machines used in heavy load, high temperature, high shock conditions due to in-sufficient supply of lubricating oil and grease. Traditional self-lubricating coatings prepared by inorganic, organic or organic-inorganic hybrid methods are prone to be oxidated at high temperatures to lose their friction reducing function, so that it is difficult to meet the engineering requirements of high-temperature lubrication. We design viscoelastic polymer coatings by a high-temperature self-lubricating and wear-resistant strategy. Polytetrafluoroethylene (PTFE, Tm = 329 °C) and polyphenylene sulfide (PPS, Tg = 84 °C, Tm = 283 °C) are used to prepare a PTFE/PPS polymer alloy coating. As the temperature increases from 25 to 300 °C, the PTFE/PPS coating softens from glass state to viscoelastic state and viscous flow state, which is owing to the thermodynamic transformation characteristic of the PPS component. Additionally the friction coefficient (µ) decreased from 0.096 to 0.042 with the increasing of temperature from 25 to 300 °C. The mechanism of mechanical deformation and surface morphology evolution for the PTFE/PPS coating under the multi-field coupling action of temperature (T), temperature–centrifugal force (T–Fω), temperature–centrifugal force–shearing force (T–Fω–Fτ) were investigated. The physical model of “thermoviscoelasticity driven solid–liquid interface reducing friction” is proposed to clarify the self-lubricating mechanism determined by the high-temperature viscoelastic properties of polymers. The high-temperature adjusts the viscosity (η) of the coating, increases interface slipping and intensifies shear deformation (τ), reducing the friction coefficient. The result is expected to provide a new idea for designing anti-ablation coatings served in high temperature friction and wear conditions.

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Adhesion and friction performance of DLC/rubber: The influence of plasma pretreatment

Cited by 25 publications

References 38 publications

Tribological performance and scuffing behaviors of several automobile piston rings mating with chrome-plated cylinder liner

Tribological performance and scuffing behaviors of several automobile piston rings mating with chrome-plated cylinder liner

An animal glycerol potassium salt without volatile organic compounds emission combined with plasma‐atomization technology and its application in green tires

Mechanism of thermoviscoelasticity driven solid-liquid interface reducing friction for polymer alloy coating

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