Role of titanium carbide and alumina on the friction increment for Cu-based metallic brake pads under different initial braking speeds

Peng, Tao; Yan, Qingzhi; Zhang, Xiaolu; Zhuang, Yan

doi:10.1007/s40544-020-0439-3

Cited by 23 publications

(7 citation statements)

References 39 publications

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“…Referring to existing studies, it is found that the simulation experiment under low load and sliding speed will not result in changes in the friction and wear mechanism of materials (Peng et al , 2021; Zuo et al , 2022). In this experiment, the friction radius is 15 mm, the contact stress is 1.0 MPa and the loading speed is 0.3 m/s.…”

Section: Methodsmentioning

confidence: 87%

Simulation experiment study on friction and wear of materials under high humidity conditions

Zhang

Yuan

et al. 2023

ILT

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Purpose The purpose of this paper is to examine the practicability of the self-designed ambient humidity controllable pin-disc/rolling multifunctional friction and wear test device and to evaluate the friction and wear characteristics of materials under diverse ambient humidity conditions in different contact forms. Design/methodology/approach The practicability of the self-designed multifunctional friction tester was examined by the friction and wear tests of materials under different ambient humidity conditions [65%RH, 98%RH (relative humidity)] in diverse contact forms (pin/disc and rolling). Meanwhile, the friction and wear properties of pin/disc samples also rolling samples were assessed from three aspects: average friction coefficient, wear mass and wear morphology. Findings The results prove that the self-designed multifunctional friction tester has practicability. Therefore, it can be used to simulate the friction and wear tests of materials under diverse ambient humidity conditions in different contact forms. Besides, it is evident that the wear damage of pin/disc and rolling samples are greatly improved under high ambient humidity conditions. And when other conditions are identical, the higher the ambient humidity, the smaller the average friction coefficient, wear mass and wear damage degree of pin/disc also rolling samples. Originality/value This paper offers a self-designed multifunctional friction and wear test device. And the tester not only can realize the control of test ambient humidity, but also achieve the wear test of pin/disc or rolling contact forms. The design and production of the tester can offer convenience for the research of tribology, and provide fundamental guidance for the study of materials under high humidity condition in diverse contact forms.

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Section: Methodsmentioning

confidence: 87%

Simulation experiment study on friction and wear of materials under high humidity conditions

Zhang

Yuan

et al. 2023

ILT

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“…Consequently, the hardness is enhanced [46,47]. For the compression test, the presence of the nano-ceramic particles dispersed formally in the Cu matrix prevents the dislocation of the particles.…”

Section: Discussionmentioning

confidence: 99%

“…This is a signal of increasing material strength with decreasing ductility. This may be attributed to the good adhesion between Cu matrix and TiC nanoparticles than between Cu and Al2O3 [46]. An extreme drop in the Cu-Al2O3 composite strength is noticed at 9 wt.% of Al2O3.…”

Section: Strengthening Criteriamentioning

confidence: 94%

Analysis of Microstructure and Mechanical Properties of Bi-Modal Nanoparticle-Reinforced Cu-Matrix

et al. 2021

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Bi-modal particles are used as reinforcements for Cu-matrix. Nano TiC and/or Al2O3 were mechanically mixed with Cu particles for 24 h. The Cu-TiC/Al2O3 composites were successfully produced using spark plasma sintering (SPS). To investigate the effect of TiC and Al2O3 nanoparticles on the microstructure and mechanical properties of Cu-TiC/Al2O3 nanocomposites, they were added, whether individually or combined, to the copper (Cu) matrix at 3, 6, and 9 wt.%. The results showed that titanium carbide was homogeneously distributed in the copper matrix, whereas alumina nanoparticles showed some agglomeration at Cu grain boundaries. The crystallite size exhibited a clear reduction as a reaction to the increase of the reinforcement ratio. Furthermore, increasing the TiC and Al2O3 nanoparticle content in the Cu-TiC/Al2O3 composites reduced the relative density from 95% for Cu-1.5 wt.% TiC and 1.5 wt.% Al2O3 to 89% for Cu-4.5 wt.% TiC and 4.5 wt.% Al2O3. Cu-9 wt.% TiC achieved a maximum compressive strength of 851.99 N/mm2. Hardness values increased with increasing ceramic content.

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“…Uyyuru et al [26] studied that sliding speed proportionally influences the tribolayer thickness. Research by Peng et al [27] on the influence of the Cu/Fe ratio and found that with an increase in Fe content stable tribo-oxides layers were formed which retards its destruction. Cu-based composites with 14 wt%Fe improved the hardness from 9.21 to 20.39HBW [28].…”

Section: Introductionmentioning

confidence: 99%

Development of functionally gradient Cu-Fe based sintered brake pad materials

Kasi,

Murugesan,

Jeyakanapathy

et al. 2024

Phys. Scr.

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The world is seeking a sustainable co-existence with nature to preserve the balance of our ecosystem. This has opened a wider market for green and renewable forms of energy to realize the energy requirements of global countries. Among the various renewable energy sources, harnessing the kinetic energy of the wind through a turbine to generate electricity has seen an ardent growth. Wind turbines, in general, function between 2 m/s and 25 m/s wind speed. When the winds cross the cut-out speed (25 m/s) or during the maintenance of wind turbine components, the brakes are implemented. The primary aerodynamic and secondary mechanical brakes comprise the wind turbine braking system. The mechanical brake pads are fixed to the brake caliper. On braking, the brake caliper pushes the brake pads against the brake disc. This recurring action gradually wears the brake material. The presence of ceramic particles in the traditionally used bulk composite pads imparts poor joint properties between the brake pad and caliper. These mandate frequent replacement of the brake pads. The current research work developed a functionally gradient brake pad through the powder metallurgy technique. The microstructure, microhardness, and tribological properties of the fabricated brake pads are tested and analyzed. Microstructural analysis revealed a homogeneous distribution of the reinforcements in the metal matrix. COF was observed to be within the desired range of between 0.3 and 0.4. The brake pad exhibited a combination of adhesive-abrasive-oxidative wear.

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Role of titanium carbide and alumina on the friction increment for Cu-based metallic brake pads under different initial braking speeds

Cited by 23 publications

References 39 publications

Simulation experiment study on friction and wear of materials under high humidity conditions

Simulation experiment study on friction and wear of materials under high humidity conditions

Analysis of Microstructure and Mechanical Properties of Bi-Modal Nanoparticle-Reinforced Cu-Matrix

Development of functionally gradient Cu-Fe based sintered brake pad materials

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