Impact of brass contents on thermal, friction and wear properties of brake linings composites

Sellami, A.; Kchaou, Mohamed; Kuş, Recai; Fajoui, Jamal; Elleuch, Riadh; Jacquemin, Frédéric

doi:10.1051/meca/2016083

Cited by 7 publications

(6 citation statements)

References 15 publications

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“…Further, the particle morphology helps the resin to bond more iron powder, which improves the strength and enhances the tribological performance, and this can be substituted in the place of steel fiber. Sellami et al 7 studied brake pads made with 1.5, 3, and 4.5 wt.% of brass and observed that increase of brass contents increased the thermal conductivity and diffusivity in a positive way. Also, he concluded that brake pad with 4.5% of brake pad resulted in good fade resistance and wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Synergic effect of metallic fillers as heat dissipaters in the tribological performance of a nonasbestos disk brake pad

Ahmed

Mohideen

Balaji

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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Brake friction linings are made of materials with a highly complex formulation that helps in improving the braking performance. The selection of friction materials with good physical, mechanical, and thermal properties is vital, which will decide the braking performance. Apart from giving good physio-mechanical properties, metallic fillers act as heat dissipaters. The objective of this work is to study the synergetic effect of prominent heat dissipaters, namely copper fibers, brass fibers, and zinc powders. Three simplified formulations were developed with 10, 14, and 18 wt.% of these heat dissipaters and named DB1, DB2, and DB3, respectively. It was observed that the addition of heat dissipaters increased the thermal properties. Tribological properties are tested based on SAE J661 standards. It was observed that DB2 had a consistent and higher coefficient of friction of 0.503 with a higher wear rate (7.6%) while DB3 had adequate μ and lower wear rate. The same batches of brake pads were tested in an inertia brake dynamometer following JASO C406 and a wear test was carried out. It was observed that % fade and % recovery were better for DB2 in both cycles. The wear rate in terms of thickness was lesser for DB2 followed by DB1 and DB3. The wear mechanism was analyzed using a scanning electron microscope. The preference selection index method of optimization was used to evaluate the overall performance parameters of the brake friction composites. Heat dissipaters with 14 wt.% have proved to be the better performers, followed by 10 and 18 wt.%.

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Section: Introductionmentioning

confidence: 99%

Synergic effect of metallic fillers as heat dissipaters in the tribological performance of a nonasbestos disk brake pad

Ahmed

Mohideen

Balaji

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Further increase in zinc above 2 % improves wear resistance by reducing the fade performance of the brake which is essential. The effect of brass (an alloy of copper and zinc) powder content on the tribological performance of NAO brake composite was evaluated by Sellami et al [12] and found that the addition of inferred that the samples with 4.5 % created plateaus and conversely if added less than 4.5% brass improved the wear performance. They also removed the material from the matrix implying a higher source of third body wear.…”

Section: Introductionmentioning

confidence: 99%

Tribological Performance of Brass Powder with Different Copper and Zinc Content in the Brake pad

Ahmed¹,

Mohideen²,

Balaji³

2020

Tribol. Ind.

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Metallic fillers play a significant role in the brake friction material formulation due to its high thermal conductivity, tribo-load bearing ability against the rotor, friction stability and wear resistance. Brass powder is widely used in the formulation because of good thermal conductivity, fade and wear resistance. The commercial brass composed of 70 wt.% copper and 30 wt.% zinc. In this work, the brass powders with identical morphology and different weight percentage (wt.%) copper and zinc content is evaluated for its tribological and physico-mechanical performance in the brake friction material formulation. Three set of brake friction pads were fabricated with three different brass powders of varying copper and zinc content, 60% Cu-40% Zn, 70% Cu-30% Zn, and 80% Cu-20% Zn, respectively. The objectives of this study were to find the physico-mechanical properties based on Indian Standard IS 2742 and tribological performance of the brake pads based on ASTM G99-95 using pin-on-disc tribometer. The wear mechanism of the brake composite of worn surface was studied using scanning electron microscope. The brake friction composites were ranked based on extension evaluation method by considering the tribo-mechanical performance parameters. It is observed that brass with 80% Cu and 20% Zn proved to be the best performer based on the weighted average dependent degree of extension evaluation.

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“…That is because similarly to copper, brass improves thermal conductivity [191,193]. Thus, more intense penetration of heat into the material takes place, which in turn accelerates the degradation of the matrix [192,194]. Moreover, brass demonstrates lubricating properties.…”

Section: Abrasivesmentioning

confidence: 99%

Conventional and unconventional materials used in the production of brake pads – review

Borawski

2020

Science and Engineering of Composite Materials

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Brakes are one of the most important components of vehicle. The brake system must be reliable and display unchanging action throughout its use, as it guards the health and life of many people. Properly matched friction pair, a disc and brake pad (in disc brakes), have a great impact on these factors. In most cases, the disc is made of grey cast iron. The brake pads are far more complex components. New technologies make it possible to develop materials with various compositions and different proportions, and connect them permanently in fully controllable processes. This elaboration shows that all these factors have a greater or lesser impact on the coefficient of friction, resistance to friction wear and high temperature, and brake pad’s operating life. This review collects the most important, the most interesting, and the most unconventional materials used in production of brake pads, and characterizes their impact on the tribological properties of pads.

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Impact of brass contents on thermal, friction and wear properties of brake linings composites

Cited by 7 publications

References 15 publications

Synergic effect of metallic fillers as heat dissipaters in the tribological performance of a nonasbestos disk brake pad

Synergic effect of metallic fillers as heat dissipaters in the tribological performance of a nonasbestos disk brake pad

Tribological Performance of Brass Powder with Different Copper and Zinc Content in the Brake pad

Conventional and unconventional materials used in the production of brake pads – review

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