The synergistic effect of carbon materials on properties of copper-based friction materials

Lin, Xin; Liu, Rutie; Wang, Lin; Li, Zhengzhou; Xiong, Xiang; Liao, Ning; Chen, Jie

doi:10.1108/ilt-02-2020-0075

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…For a more detailed comparison between previous and current studies, HR-XPS analysis was conducted. Interestingly, when we compared the S 2p spectra with previous work (Figure b,e), the intensity of the SO 4 2– chemical state at ∼167 eV decreased and the disulfide bonding character disappeared in this work (Figure e). These results imply that the impurity may contain sulfate salts, which were removed during the intermediate centrifugation step.…”

Section: Resultssupporting

confidence: 48%

Insight into the Synthetic Mechanism of Cadmium-Free Blue-Emissive Quantum Dots for Eco Light-Converting System

Lee,

Kim,

Kim

et al. 2024

ACS Sustainable Chem. Eng.

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Cd-free nanocrystals, such as CuCrS 2 /ZnS (CCS/ZnS) quantum dots (QDs), have been highlighted as potential blue-emitting probes. However, the relatively irregular and less uniform morphological structure of QDs synthesized by conventional methods indicated low optical performance with a photoluminescence quantum yield (PLQY) of ∼0.05. Herein, we modified the synthetic method for CCS/ZnS QDs based on the hard and soft acids and bases (HSAB) theory. By using the HSAB-based precursors and appropriate ligand moieties, we synthesized QDs with a uniform morphology and enhanced PLQY of ∼0.16. The core−shell formation of the CCS/ZnS QDs was confirmed using X-ray spectroscopic methods. Consequently, a QD-incorporated polymer matrix as a color filter for a white-light-emitting diode (LED) by hybridizing Cd-free blue-emitting CCS/ZnS QDs and yellow-emitting CuInS 2 / ZnS/ZnS QDs in poly(methyl methacrylate) was fabricated. Their optical properties were systematically controlled by modifying the ratio of the two QDs, resulting in (CIE x , CIE y = 0.254−0.34, 0.245−0.299) of color coordinates and 21914.48 to 5071.39 K of correlated color temperature. This study demonstrates the potential of the environmentally friendly QD-based display technology.

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Section: Resultssupporting

confidence: 48%

Insight into the Synthetic Mechanism of Cadmium-Free Blue-Emissive Quantum Dots for Eco Light-Converting System

Lee,

Kim,

Kim

et al. 2024

ACS Sustainable Chem. Eng.

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show abstract

“…Therefore, carbon fiber composites are widely used in aerospace and highend automotive applications (Zhang et al, 2023a(Zhang et al, , 2023b. It plays a key role in maintaining the brake material strength, thermal stability and friction performance prediction (Lin et al, 2021;Bukovsky et al, 2020;Shi et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Prediction and comparative analysis of friction material properties using a GA-SVM optimization model

Zhang,

Wang,

Wang

2024

ILT

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Purpose With the rapid advancement in the automotive industry, the friction coefficient (FC), wear rate (WR) and weight loss (WL) have emerged as crucial parameters to measure the performance of automotive braking systems, so the FC, WR and WL of friction material are predicted and analyzed in this work, with an aim of achieving accurate prediction of friction material properties. Design/methodology/approach Genetic algorithm support vector machine (GA-SVM) model is obtained by applying GA to optimize the SVM in this work, thus establishing a prediction model for friction material properties and achieving the predictive and comparative analysis of friction material properties. The process parameters are analyzed by using response surface methodology (RSM) and GA-RSM to determine them for optimal friction performance. Findings The results indicate that the GA-SVM prediction model has the smallest error for FC, WR and WL, showing that it owns excellent prediction accuracy. The predicted values obtained by response surface analysis are closed to those of GA-SVM model, providing further evidence of the validity and the rationality of the established prediction model. Originality/value The relevant results can serve as a valuable theoretical foundation for the preparation of friction material in engineering practice.

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Role of solid lubricants/sulfide mix in brake performance for automotive applications—a review

Eakambaram

Balaji

Sethupathi

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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Friction materials play a crucial role in the safe movement of automobiles and the protection of human life. As the pad slides against its mating partner, the kinetic energy is transferred into frictional heat. The developed friction at the interface causes the vehicle to slow down as its momentum is dissipated as heat in the pads and rotors. Further, it causes the degradation of the binder and thus the stability of the friction coefficient becomes questionable. Therefore, the role of solid lubricants comes to the scenario which tends to mitigate the abrasion. It is noticed that the sulfide mix composites delay the thermal degradation of the binder by increasing its oxidation resistance. Some researchers have achieved this by blending various resins. Further, solid lubricants have a good third body and secondary film-forming ability and thus they reduced the wear, due to their excellent adhesion properties to the metal substrate. Hence, this review focused on the role of different solid lubricants and sulfide mix/sulfide blend in the stabilization of friction coefficient and controlling the wear.

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The synergistic effect of carbon materials on properties of copper-based friction materials

Cited by 4 publications

References 14 publications

Insight into the Synthetic Mechanism of Cadmium-Free Blue-Emissive Quantum Dots for Eco Light-Converting System

Insight into the Synthetic Mechanism of Cadmium-Free Blue-Emissive Quantum Dots for Eco Light-Converting System

Prediction and comparative analysis of friction material properties using a GA-SVM optimization model

Role of solid lubricants/sulfide mix in brake performance for automotive applications—a review

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