A short review on the effect of transfer layer on tribological study of composite materials

Pradeepkumar, C.; Karthikeyan, Subramanian; Rajini, N.

doi:10.1016/j.matpr.2021.09.416

Cited by 4 publications

(3 citation statements)

References 27 publications

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“…In an attempt to gain a deeper understanding of the impact of friction reducers in unconventional couplings such as PEEK-steel, it is essential to consider two crucial factors discussed in the literature: alterations in the hardness of PEEK surfaces and the creation of transfer films [28][29][30][31][32][33][34] formed by PEEK on steel counterparts. When a PEEK-steel contact is subjected to water lubrication, research by Yamamoto and Takashima [35] has demonstrated an increase in PEEK wear compared to dry conditions, primarily due to the reduction in the hardness of the PEEK sliding surface.…”

Section: Introductionmentioning

confidence: 99%

Effect of Friction Reducers with Unreinforced PEEK and Steel Counterparts in Oil Lubrication

Massocchi,

Chatterton,

Lattuada

et al. 2023

Lubricants

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The increasing adoption of PEEK (polyetheretherketone) in many industrial applications has promoted intense research to optimize its lubrication along with the development of friction reducers (FRs), additives that help in reducing fuel consumption and, consequently, CO2 emissions. In this study, the effect of FRs in improving the lubrication of PEEK–steel couplings was evaluated and their mechanism studied using the Mini Traction Machine (MTM) tribometer. Different types of FRs (such as Molybdenum dithiocarbamate, glycerol monooleate, amine and polymeric derivatives) and coupling combinations (steel/steel, steel/PEEK and PEEK/steel) were considered. The oil samples were evaluated as fresh and after a rubbing time considering different operative conditions (from high to low T, fixed load and type of contact motion), and a measurement of the tribofilm was acquired. The experimental campaign showed a ranking among FRs friction-reducing behavior and, in some cases, a synergistic effect was noted between the tribofilm containing the friction modifier and the PEEK surface. Comparing the top performing FRs with reference oil showed a reduction in friction of 22%, 21% and 37%, respectively, in steel–steel, PEEK–steel and steel–PEEK couplings, while in the standard steel–steel coupling, two out of four FRs did not reduce the friction. After conditioning in the presence of PEEK, all friction-modifier additives reduced the friction effectively. This demonstrates the promising performance of PEEK, its compatibility with friction-reducing additives, and its applicability to sliding machine parts in order to improve efficiency and thus reduce CO2 emissions.

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Section: Introductionmentioning

confidence: 99%

Effect of Friction Reducers with Unreinforced PEEK and Steel Counterparts in Oil Lubrication

Massocchi,

Chatterton,

Lattuada

et al. 2023

Lubricants

View full text Add to dashboard Cite

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“…Thus, the study of additives to improve the friction-wear properties of CBFM is necessary and urgent. The silicon carbide particles (SCN), which have the advantages of stable chemical properties, high thermal conductivity, low thermal expansion coefficient, and excellent wear resistance, have been widely used as an abrasive in composite materials [28][29][30][31]. It was employed to improve tribological properties such as anti-wear, reducing friction, and high load capacity [32].…”

Section: Introductionmentioning

confidence: 99%

Effect of Silicon Carbide Nanoparticles on the Friction-Wear Properties of Copper-Based Friction Discs

Zheng

et al. 2022

Materials

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To study the influence of nano-additives on the friction-wear characteristics of friction materials, the nano-sized silicon carbide particles which have excellent chemical and physical properties are considered to add in composite to form the modified friction material. The influence of the silicon carbide nanoparticles (SCN) on the friction-wear characteristics of copper-based friction materials (CBFM) is investigated via the SAE#2 (made in Hangzhou, China) clutch bench test with the applied pressure, rotating speed, and automatic transmission fluid (ATF) temperature taken into account. Moreover, the variations of friction torque and temperature are considered to evaluate the friction performance, and the variable coefficient is employed to describe the friction stability. The wear characteristics of friction materials are investigated by the disc changes in thickness and micro-morphology. The results show that the CBFM with SCN can provide a higher friction torque, which increased by 30% to 50% compared with CBFM. The variable coefficient of CBFM with SCN changes from 674 to 52 with the rotating speed raised from 600 rpm to 3000 rpm, which shows that the friction stability is relatively worse. Furthermore, the micromorphology shows that the CBFM with SCN has lower porosity and surface roughness, which increases the microscopic contact area and the coefficient of friction (COF). Simultaneously, the reduction in porosity also leads to a decrease in the cooling quality, bringing about a rapid temperature rise. Thus, the wear amount of CBFM with SCN increases significantly, especially for the friction disc in the axial middle position.

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“…In the wet multi-plate clutch, the satisfactory performance of the friction material directly determines the application range and lifetime of the clutch [ 1 , 2 , 3 ]. With the development of the wet multi-plate clutch towards high power density, low energy consumption, and no environmental pollution, the requirements of paper-based friction materials are continuously being improved [ 4 , 5 , 6 , 7 ], especially in terms of friction-wear performance, mechanical strength, heat resistance, load adaptability, and environment-friendly performance [ 8 , 9 ]. Paper-based friction materials consist of fillers, fibers, binders, and modifiers, which are generally selected and mixed by trial-and-error method [ 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Friction-Wear Characteristics of Carbon Fiber Reinforced Paper-Based Friction Materials under Different Working Conditions

Zheng

Xiong

et al. 2022

Materials

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To study the friction and wear performance of carbon fiber reinforced friction materials under different working conditions, paper-based friction materials with different fibers were prepared. Experiments on the SAE#2 test bench were conducted to study the infectors including friction torques, surface temperature, coefficient of friction (COF), and surface morphologies. The results were analyzed, which indicated that the carbon fiber reinforced friction material could provide a higher friction torque and a lower temperature rising rate under the applied high pressure and high rotating speed conditions. As the pressure increased from 1 MPa to 2.5 MPa, the friction torque of plant fiber reinforced material increased by 150%, the friction torque of carbon fiber reinforced material increased by 400%, and the maximum temperature of plant fiber reinforced and carbon fiber reinforced material reached the highest value at 1.5 MPa. Thus, carbon fibers not only improved the COF and friction torque performance but also had advantages in avoiding thermal failure. Meanwhile, carbon fiber reinforced friction materials can provide a more stable COF as its variable coefficient (α) only rose from 38.18 to 264.62, from 1 MPa to 2.5 MPa, which was much lower than the natural fiber reinforced friction materials. Simultaneously, due to the good dispersion and excellent mechanical properties of PAN chopped carbon fibers, fewer pores formed on the initial surface, which improved the high wear resistance, especially in the intermedia disc.

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A short review on the effect of transfer layer on tribological study of composite materials

Cited by 4 publications

References 27 publications

Effect of Friction Reducers with Unreinforced PEEK and Steel Counterparts in Oil Lubrication

Effect of Friction Reducers with Unreinforced PEEK and Steel Counterparts in Oil Lubrication

Effect of Silicon Carbide Nanoparticles on the Friction-Wear Properties of Copper-Based Friction Discs

Friction-Wear Characteristics of Carbon Fiber Reinforced Paper-Based Friction Materials under Different Working Conditions

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