A high-performance copper-based brake pad for high-speed railway trains and its surface substance evolution and wear mechanism at high temperature

Zhang, Peng; Zhang, Lin; Wei, Dongbin; Wu, Peifang; Cao, Jingwu; Shijia, Cairang; Qu, Xuanhui

doi:10.1016/j.wear.2019.203182

Cited by 38 publications

(7 citation statements)

References 31 publications

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“…Fewer studies have investigated the excessive wear and loss of integrity of brake pads or shoes for drum brakes. Some studies have focused on metal-matrix brake pads (such as [ 23 ]), designed for high-speed trains or heavy-duty vehicles. Regarding organic matrix brake materials, Barros et al [ 24 ] highlighted the role of contact pressure in the transition to severe wear.…”

Section: Introductionmentioning

confidence: 99%

Differences in Wear and Material Integrity of NAO and Low-Steel Brake Pads under Severe Conditions

et al. 2021

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In this study, through severe reduced-scale braking tests, we investigate the wear and integrity of organic matrix brake pads against gray cast iron (GCI) discs. Two prototype pad materials are designed with the aim of representing a typical non-metal NAO and a low-steel (LS) formulation. The worn surfaces are observed with SEM. The toughness of the pad materials is tested at the raw state and after a heat treatment. During braking, the LS-GCI disc configuration produces heavy wear. The friction parts both keep their macroscopic integrity and wear appears to be homogeneous. The LS pad is mostly covered by a layer of solid oxidized steel. The NAO-GCI disc configuration wears dramatically and cannot reach the end of the test program. The NAO pad suffers many deep cracks. Compacted third body plateaus are scarce and the corresponding disc surface appears to be very heterogeneous. The pad materials both show similar strength at the raw state and similar weakening after heat treatment. However, the NAO material is much more brittle than the LS material in both states, which seems to favor the growth of cracks. The observations of crack faces suggest that long steel fibers in the LS material palliate the brittleness of the matrix, even after heat damage.

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Section: Introductionmentioning

confidence: 99%

Differences in Wear and Material Integrity of NAO and Low-Steel Brake Pads under Severe Conditions

et al. 2021

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“…Zhang, Zhang, Wu, et al [16] tested the stopping power of the "copper-based brake pads" with varying amounts of carbon fibre (CF) on a scaled-down dynamometer. The findings demonstrate that the addition of CF significantly alters the tribo-microhardness film's and plastic deformation resistance.…”

Section: Literature Reviewmentioning

confidence: 99%

A comprehensive literature review on the recent advances in braking systems technology using FEA

Usmani,

Mohan,

Mewada

et al. 2023

J. Phys.: Conf. Ser.

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“An object remains in its state of rest or in motion until and unless acted upon by an external force” Newton’s first law of motion, Braking systems were made possible by this rule of Sir Isaac Newton, which states that the greater the vehicle’s speed, the greater the brake force needed to slow it down. This idea spawned several studies in the subject of braking, leading to its development, which in turn has given us the luxury of picking the most effective braking system for any given situation. This research analyses the thermomechanical behaviour of dry disc-to-pad contact during braking using Finite Element Analysis (FEA). Air ventilation and friction will be increased by modulating the design for disc heating issue due to long life of brake disc. The modeling of transient disc brake temperature is used to determine the disc’s geometric design for vehicle ventilation. The thermal-structural analysis is coupled to calculate disc deformation, Von Mises stress, as well as pad contact temperature distribution. The findings match the specialist literature.

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“…The coordination between brake disks and brake pads directly influences the coefficient of friction (COF) and wear performance of the system. The friction counterparts experience severe service conditions during emergency braking, especially in high‐speed conditions and in a detrimental atmosphere 4,5 . Therefore, it is imperative to thoroughly investigate the friction and wear characteristics of braking couples when introducing newly designed friction materials.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous enhancement of friction and wear resistance for high‐speed braking system with Cr₃C₂‐NiCr‐coated brake disk

Wen,

Zhang,

Zhang

et al. 2023

Int J Applied Ceramic Tech

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The current steel brake disk and Cu‐based powder metallurgy brake pad used in high‐speed trains suffer fading coefficient of friction (COF) and excessive wear, resulting in a shorten lifetime and numerous exhausted brake disks. High‐velocity oxygen fuel (HVOF) spray‐prepared coatings have proven their ability to improve COF and decrease wear rate. In this article, Cr3C2‐NiCr coating was sprayed on a steel brake disk, and a series of emergency braking tests under dry and wet conditions were performed on a subscale brake dynamometer, to comprehensively evaluate the braking performance of coated brake disk. The results showed that the coated brake disk exhibits a higher COF at 380 km/h, which effectively inhibits the COF fade compared to the steel brake disk case. The coated brake system also achieves a lower wear rate of the brake pad at 380 km/h, showing the desired high COF and low wear rate properties of the braking system. Additionally, the coated brake disk maintained surface integrity even after severe braking tests, highlighting its potential in the braking system. Based on the characterizations of wear debris and brake pads, a harder and thinner oxide friction film plays a crucial role in achieving the excellent braking performance in coated brake disk cases.

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A high-performance copper-based brake pad for high-speed railway trains and its surface substance evolution and wear mechanism at high temperature

Cited by 38 publications

References 31 publications

Differences in Wear and Material Integrity of NAO and Low-Steel Brake Pads under Severe Conditions

Differences in Wear and Material Integrity of NAO and Low-Steel Brake Pads under Severe Conditions

A comprehensive literature review on the recent advances in braking systems technology using FEA

Simultaneous enhancement of friction and wear resistance for high‐speed braking system with Cr₃C₂‐NiCr‐coated brake disk

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A high-performance copper-based brake pad for high-speed railway trains and its surface substance evolution and wear mechanism at high temperature

Cited by 38 publications

References 31 publications

Differences in Wear and Material Integrity of NAO and Low-Steel Brake Pads under Severe Conditions

Differences in Wear and Material Integrity of NAO and Low-Steel Brake Pads under Severe Conditions

A comprehensive literature review on the recent advances in braking systems technology using FEA

Simultaneous enhancement of friction and wear resistance for high‐speed braking system with Cr3C2‐NiCr‐coated brake disk

Contact Info

Product

Resources

About

Simultaneous enhancement of friction and wear resistance for high‐speed braking system with Cr₃C₂‐NiCr‐coated brake disk