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

Multi‐walled carbon nanotubes (MWCNTs) filled graphite lubricated phenolic‐based friction composites reinforced with combination of lapinus/Kevlar fibers have been fabricated and subsequently evaluated for their dynamic‐mechanical and tribological properties. The experimental results indicated that the higher MWCNT content enhances the thermal stability, whereas, lower MWCNT content enhances the thermo‐mechanical properties of the friction composites. The tribo‐performance evaluation has revealed that with the increase in MWCNT content, the friction‐fade and friction‐recovery performances are enhanced. The friction‐stability and friction‐variability coefficients are influenced by the combination of MWCNT, graphite, lapinus, and Kevlar constituents. The wear performance decreases with the increase in lapinus and MWCNT, whereas, it increases when the amount of Kevlar or graphite is increased in the composites. Wear surface morphological studies have led to the qualitative characterization of the topographical attributes and the nature of the frictional contact patches which is crucial in understanding the role of MWCNT on friction and wear mechanisms of the investigated automotive brake friction materials. POLYM. COMPOS., 38:1183–1193, 2017. © 2015 Society of Plastics Engineers

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“…. The stability coefficient is the ratio of μ p and μ max whereas the variability coefficient is the ratio of μ min and μ max . From the Fig.…”

Section: Resultsmentioning

confidence: 98%

Thermo‐mechanical and tribological properties of multi‐walled carbon nanotubes filled friction composite materials

Singh

Patnaik

2015

Polymer Composites

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“…The fade and recovery assessment tests are conducted on a Krauss machine in conformance to regulations laid by Economic commission of Europe (ECE R-90), details of which are mentioned elsewhere (Singh et al, 2013b). The Krauss machine is fully computer-controlled having data acquisition capabilities.…”

Section: Tribological Performance Evaluation Methodologymentioning

confidence: 99%

Assessment of braking performance of lapinus–wollastonite fibre reinforced friction composite materials

Singh

Patnaik

Chauhan

et al. 2017

Journal of King Saud University - Engineering Sciences

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Brake friction materials comprising of varying proportions of lapinus and wollastonite fibres are designed, fabricated and characterized for their chemical, physical, mechanical and tribological properties. Tribological performance evaluation in terms of performance coefficient of friction, friction-fade, friction-recovery, disc temperature rise (DTR) and wear is carried out on a Krauss machine following regulations laid down by Economic Commission of Europe (ECE R-90). The increase in wollastonite fibre led to an increase in density and hardness whereas void content, heat swelling, water absorption and compressibility increased with the increased in lapinus fibre. The performance coefficient of friction, friction-fade behaviour and friction-stability have been observed to be highly dependent on the fibre combination ratio i.e. coefficient of friction, fade and friction-stability follow a consistent decrease with a decrease in the lapinus fibre content, whereas the frictional fluctuations in terms of l max À l min have been observed to increase with a decrease in lapinus fibre content. However, with an increase in wollastonite fibre content in formulation mix, a higher wear resistance and recovery response is registered. The worn surface morphology has revealed topographical variations and their underlying role in controlling the friction and wear performance of such brake friction composites. ª 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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“…Detail of the processing conditions for composite fabrication is briefly reported elsewhere [21][22][23]. …”

Section: Materials and Fabrication Of Friction Specimensmentioning

confidence: 99%

Optimum design of brake friction material using hybrid entropy-GRA approach

Kumar

Singh

Rajoria

et al. 2016

MATEC Web of Conferences

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Abstract. The effect of Kevlar and natural fibres on the performance of brake friction materials was evaluated. Four friction material specimens were developed by varying the proportion of Kevlar and natural fibres. Two developed composite contained 5-10 wt.% of Kevlar fibre while in the other two the Kevlar fibre was replaced with same amount of natural fibre. SAE J661 protocol was used for the assessment of the tribological properties on a Chase testing machine. Result shows that the specimens containing Kevlar fibres shows higher friction and wear performance, whereas Kevlar replacement with natural fibre resulted in improved fade, recovery and friction fluctuations. Further hybrid entropy-GRA (grey relation analysis) approach was applied to select the optimal friction materials using various performance defining attributes (PDA) including friction, wear, fade, recovery, friction fluctuations and cost. The friction materials with 10 wt% of natural fibre exhibited the best overall quality.

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

Cited by 30 publications

References 26 publications

Thermo‐mechanical and tribological properties of multi‐walled carbon nanotubes filled friction composite materials

Thermo‐mechanical and tribological properties of multi‐walled carbon nanotubes filled friction composite materials

Assessment of braking performance of lapinus–wollastonite fibre reinforced friction composite materials

Optimum design of brake friction material using hybrid entropy-GRA approach

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