Evaluation of fade‐recovery performance of hybrid friction composites based on ternary combination of ceramic‐fibers, ceramic‐whiskers, and aramid‐fibers

Kumar, Mukesh; Satapathy, Bhabani K.; Patnaik, Amar; Kolluri, Dilip K.; Tomar, Bharat S.

doi:10.1002/app.35550

Cited by 18 publications

(11 citation statements)

References 32 publications

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“…8. The stability coefficient (a) is the ratio of l P to l max , whereas variability coefficient (c) is given by ratio of l min to l max (Ref [5][6][7]. It is observed that stability coefficient remains higher when the proportion of nanoclay remains £2.…”

Section: Tribological Performance Of the Compositesmentioning

confidence: 93%

“…The standard regulatory test procedure PVW-3212 (Pulse Velocity Wave) confirming to protocol R-90 of Economic Commission for Europe (ECE) have been adopted for the evaluation of faderecovery characteristics of the friction material. The detailed description of schematic of the machine and test procedure is briefly reported in our earlier publications ( Ref 2,3,[5][6][7]9). The uniformly polished brake pads are mounted on the sliding calliper and a nominal braking pressure of 2 MPa was applied in accordance to protocol and pad surface area.…”

Section: Tribological Performance Evaluation Methods and Procedures Formentioning

confidence: 99%

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Effect of Nanoclay Reinforcement on the Friction Braking Performance of Hybrid Phenolic Friction Composites

Singh

Patnaik

Satapathy

et al. 2012

J. of Materi Eng and Perform

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Friction composite formulation consisting of decreasing nanoclay/lapinus fibres content, increasing graphite/aramid fibres content, and master batch of phenolic/barite is designed, fabricated, and characterized for their mechanical, thermo-mechanical, and tribological studies in braking situations. A standard test protocol is adopted for evaluating braking performance. The nanoclay content (£2.25 wt.%) enhances hardness, impact strength, storage, and loss modulus characteristics of the friction composites. Such composites exhibit higher friction stability as well as variability coefficient. However, composites with higher content of nanoclay ($2.75 wt.%) exhibit moderate level of stability coefficient and minimum variability coefficient. Fade performance improves with nanoclay content whereas friction fluctuations increase continuously with increasing nanoclay content. The disc temperature continuously rises with nanoclay contents, it becomes maximum for nanoclay content 2.75 wt.%. The same composition found to be effective in arresting temperature rise, arrests fading, improves recovery, moderate stability with minimum variability coefficient, and higher level of l-performance hence recommended. The wear performance deteriorates with lapinus/nanoclay content and improves with the amount of aramid/graphite in the friction composites. Worn surface morphology study (using SEM) reveals the associated wear mechanisms responsible for wear of investigated composites. XRD study confirms the presence and dispersion of nanoclay with other composite ingredients.

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Section: Tribological Performance Of the Compositesmentioning

confidence: 93%

Section: Tribological Performance Evaluation Methods and Procedures Formentioning

confidence: 99%

Effect of Nanoclay Reinforcement on the Friction Braking Performance of Hybrid Phenolic Friction Composites

Singh

Patnaik

Satapathy

et al. 2012

J. of Materi Eng and Perform

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“…The mechanical features and the quality of the particles play a significant role here [29]. The performance-composition-domain correlation of brake composites has been comprehensively demonstrated [67].…”

Section: Compressibility Testmentioning

confidence: 99%

Brake Pad Performance Characteristic Assessment Methods

Akıncıoğlu

Akincioğlu

Öktem

et al. 2021

International Journal of Automotive Science and Technology

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Along with the developing technology, expectations for improved automobile brake pads are also rising. Research on higher performance brake pads is contin-uing at a rapid pace. It is also recognized that in this field, widespread efforts are being made towards the production of brake pads which are economical, envi-ronmentally friendly and do not pose risks to human health. In recent years, non-industrial waste products have also been used as additives in brake pads, thus contributing to local economy. Performance tests have to be carried out so that the brake pads produced with the new compositions can be used. For this reason, the performance tests of the brake pads are important. This study brings a new overview via an investigation of the methods applied in determining their per-formance characteristics.

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“…The real contact area depends on the formation of contact patches at the friction interface. The embedded broken fibers on the surface result in the formation of primary plateaus whereas smooth protruding patches on the specimen surface give rise to the secondary plateaus of the composites [19]. Primary plateaus increase the area of real contact between the test specimens and counter face.…”

Section: Friction and Wear Studymentioning

confidence: 99%

Performance assessment of hybrid fibrous fillers on the tribological and thermo-mechanical behaviors of elastomer modified phenolic resin friction composite

2020

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The tribological and thermo-mechanical properties of multi-component friction composites can be improved through the addition of hybrid fibrous components. The present article reports an empirical route for optimization of the relative proportion of two fibrous fillers viz. aramid pulp and lapinus fibers in a friction compound where the matrix component consists of phenolic resin modified with particulate acrylonitrile butadiene rubber powder. The effects of the change in net fiber concentration, as well as the relative proportion of these two fibrous components (aramid/lapinus) on different properties of friction composites like the coefficient of friction, rate of wear, thermal conductivity, and thermal decomposition were systematically investigated to get optimized composition. Aramid pulp concentration was changed from 10 to 40 phr (parts per hundreds of phenolic resin) whereas lapinus fiber from 50 to 300 phr. It was found that the 20 phr aramid pulp loaded composites show a stable coefficient of friction of 0.24 irrespective of the relative proportion of lapinus fibers. The specific wear rate of the composites having less fiber content is found to be better than that of composites with higher loading. However, the addition of fiber in composites improves thermal conductivity. In fact, the thermal conductivity of fiber loaded composites is ~ 2.5-fold higher than that of the unfilled one. The morphological analysis of the worn surfaces through the scanning electron microscopy reveals that the abrasive wear mechanism dominates during wear process.

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Evaluation of fade‐recovery performance of hybrid friction composites based on ternary combination of ceramic‐fibers, ceramic‐whiskers, and aramid‐fibers

Cited by 18 publications

References 32 publications

Effect of Nanoclay Reinforcement on the Friction Braking Performance of Hybrid Phenolic Friction Composites

Effect of Nanoclay Reinforcement on the Friction Braking Performance of Hybrid Phenolic Friction Composites

Brake Pad Performance Characteristic Assessment Methods

Performance assessment of hybrid fibrous fillers on the tribological and thermo-mechanical behaviors of elastomer modified phenolic resin friction composite

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