Role of the friction layer formed on the brake lining surface in friction stabilization for automotive brakes

Ali, Mohamed Kamal Ahmed; Makrahy, Mostafa M.; Hou, Xiaofan

doi:10.1088/2051-672x/ab0ea1

Cited by 12 publications

(6 citation statements)

References 50 publications

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“…The higher amount of the bismuth sulfide worked more effectively with aramid and graphite to form the thin protective film on the rubbing surfaces which reduced the direct contact of disc asperity to plough the brake pad base material [5,36]. Hence the brake pad sample B 100 I 0 provided the lowest wear loss among the developed samples.…”

Section: Wear and Worn Surface Analysismentioning

confidence: 99%

Synergistic effect of bismuth III sulfide and iron sulfide in the tribological performance of brake friction composite

Balachandran¹,

K²,

AHMED³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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Metal sulfides play a major role in determining the friction and wear performance of the brake friction composites. The usage of the combinations of metal sulfides improves tribological performance compared to its individual metal sulfides in the formulation of friction material. In this work, the effect of the Bismuth III sulfide and Iron disulfide combination was evaluated against the tribological performance in the formulation of the friction materials. Six brake friction pads were developed by properly balancing the weight percentage of Bismuth III sulfide and Iron disulfide in the formulation. The tribological performance of the friction liners was studied using a chase tribo-meter following the IS2742 test protocol. The worn surfaces of the brake pad samples were examined for its surface morphology and elemental behaviour using a Scanning electron microscope and an Energy-dispersive X-ray spectroscope. It was observed that the partial replacement of the Bismuth III sulfide with Iron sulfide improves the friction and fade performance. The abrasive nature of the Iron sulfide in the friction pad increases the coefficient of friction and causes the high wear loss beyond the ratio of 4:6 of the mixed sulfides. A statistical approach named preference selection Index was employed to rank the brake friction materials based on the multiple performance criteria.

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Section: Wear and Worn Surface Analysismentioning

confidence: 99%

Synergistic effect of bismuth III sulfide and iron sulfide in the tribological performance of brake friction composite

Balachandran¹,

K²,

AHMED³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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“…Friction stabilization and accelerated wear cause the brake lining to shield the friction layer as shown in Figure 9. 81 The friction layer thickness (0.5 to 5 µm) affects frictional behaviour. The rubbing surface analysis of the brake lining and rotary disk by FESEM, TEM, and EDS analysis shows morphological and microstructural analysis.…”

Section: Friction Layer and Transfer Layer Mechanismsmentioning

confidence: 99%

Review of automotive brake lining materials and their tribological properties

Ahdy

Ali

Mourad

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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Brake lining material properties are considered an essential aspect of the safe operation of vehicles. The presented paper aims to present a comprehensive review of brake lining materials and their tribological properties including the proposed materials, their advantages and disadvantages, analysis of results, and test rig experiments. The first section of the paper includes brief information on brake lining materials, friction modifier additives, and recent developments in friction additives. The second section discusses the tribological performance of brake lining materials. Furthermore, the key mechanisms of the friction layer produced on the worn brake lining surface have been explained microscopically (HRTEM). Part of this review is devoted to demonstrating current research gaps and challenges related to brake performance in automotive for further research. In brief, this review study is highly significant, as it provides more detailed information regarding the performance of brake lining materials.

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“…As sacrificial materials, these friction materials are primarily used to transform kinetic energy into mechanical energy by dry friction [1]. Hence, brake friction material's important and technically necessary requirement is to provide a stable and high coefficient of friction with low wear irrespective of temperature, environment friendliness, low noise, squeal, fade and speed variation [2,3]. To attain such characteristics, an amalgamation of 10-15 ingredients is utilised to create the formulation [4].…”

Section: Introductionmentioning

confidence: 99%

Synergistic performance of expanded graphite—mica amalgamation based non-asbestos copper-free brake friction composites

Sathyamoorthy

Vijay

Singaravelu

2022

Surf. Topogr.: Metrol. Prop.

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Recent advancements in brake pad applications emphasise various friction compositions that exclude toxic components such as asbestos, copper etc., in order to provide superior performance without hurting the environment, human life and aquarium species. In this work, brake friction materials were fabricated by the conventional manufacturing process as standard brake pads using expanded graphite with the synergetic effect of thermal resistant material mica flakes. Six standard brake pads were produced based on varying the expanded graphite by 16, 14, 12, 8, 6 & 4 weight percentage, which is compensated using the Mica flakes by 4, 6, 8, 12, 14 & 16 weight percentage, fixing the composition of other ingredients and designated as BM01, BM02, BM03, BM04, BM05 and BM06. Physical, chemical and mechanical, characterisations of the formed friction materials were carried out in accordance with IS 2742 and ISO 6312. A full-scale inertia brake dynamometer was used to determine the fade, recovery characterisations with the pressure and speed sensitivity as of JASO-C-406. From the experimental observations, BM03 friction composites reveal excellent low fade and high recovery characteristics because of the integrated effect of expanded graphite (superior lubricity) & mica (good thermal stability). Worn surface analysis was studied with the help of a scanning electron microscope. The inclusion of expanded graphite-mica as a hybrid “lubricant-filler” combination in composite materials for friction braking application results in performance synergism.

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Role of the friction layer formed on the brake lining surface in friction stabilization for automotive brakes

Cited by 12 publications

References 50 publications

Synergistic effect of bismuth III sulfide and iron sulfide in the tribological performance of brake friction composite

Synergistic effect of bismuth III sulfide and iron sulfide in the tribological performance of brake friction composite

Review of automotive brake lining materials and their tribological properties

Synergistic performance of expanded graphite—mica amalgamation based non-asbestos copper-free brake friction composites

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