Friction Braking Performance of Nanofilled Hybrid Fiber Reinforced Phenolic Composites: Influence of Nanoclay and Carbon Nanotubes

Abstract

Graphite lubricated phenolic-based friction composites¯lled with nanoclay and Multiwalled carbon nanotubes (MWCNT) and reinforced with lapinus and Kevlar¯bers have been successfully fabricated for evaluation of their physical, chemical, mechanical and tribological properties, respectively. The increase in nanoclay and MWCNT contents led to the increase in bulk physical properties such as void contents, ash contents, water absorption and compressibility. The impact, tensile and°exural strengths get a®ected deleteriously when complemented by lapinus and kevlar¯bers in the composites. However, with the increase in nanoclay and MWCNT contents the -performance, friction fade resistance and friction recovery enhanced whereas, friction°u ctuations, stability and variability coe±cients have been observed to be dependent on the composition. The addition of nanoclay and MWCNT raises the disc temperature whereas wear resistance of the friction composites increases with the decreasing in nanoclay and MWCNT contents. Comprehensively, it is found that with the higher nanoclay: MWCNT ratio (i.e., 1.375:1.375 wt.%) overall frictional response ( p ¼ 0:386) is enhanced, showed lowest fading (fade ¼ 22:80%) and excellent recovery performance (recovery ¼ 130:37%). Finally, the wear surface morphology studies have been done by using scanning electron microscope (SEM) to analyze the wear mechanisms qualitatively by understanding nature of the friction contact patches.

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

“…The higher abrasive force of the fixed lapinus fiber containing composites is thought to be related to their lower wear resistance compared to aramid pulp containing composites. The aramid pulp being soft and organic in nature have better compatibility with the organic polymeric matrix consequently enhances the adhesive component of wear compared to abrasive one [20]. It is interesting to note from Figs.…”

Thermal stability analysis of nano-particulate-filled phenolic-based friction composite materials

“…In order to mix nano-particulates with other ingredients, the process of shear-induced distributive mixing is adopted within the course of which some extent of dispersive mixing is additionally obtained. However, for nano-particulate-filled friction composites, distributive mixing is reportedly more efficacious than dispersive mixing [28][29][30][31][32][33][34].…”

“…The effect of nano-particulates on the tribo-performance of friction formulation has been investigated by many formulation designers [28][29][30][31][32][33][34]. Shao et al [28] investigated the influence of micro-and nanoalumina contents on tribological properties of poly (phthalazine ether sulfone ketone)-based friction materials.…”

“…Liu et al [29] concluded that nanorubber (styrene butadiene and nitrile butadiene) inclusion in friction formulation improves the friction level and stability with respect to temperature and wear resistance. Furthermore, the incorporation of multiwalled carbon nanotube (MWCNT) [30,31], nanoclay [32] and their combination [34] in friction formulations has been found to cause an enhancement in the thermal stability, fade performance and wear resistance in addition to facilitating a stable coefficient of friction.…”

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

“…The role of each class viz. fibres Kumar and Bijwe, 2013;Ikpambese et al, 2014), space filler (Handa and Kato, 1996), friction modifier (Cho et al, 2006;Lee et al, 2009) and binder Shin et al, 2010) in the friction material has been extensively studied for improving the tribological performance and new ingredients are still being developed to attain higher triboperformance (Dadkar et al, 2009;Singh et al, 2011Singh et al, , 2013aYawas et al, 2013;Tiwari et al, 2014;Idris et al, 2015).…”