Allied Nippon Industries

Sahibabad, India

Allied Nippon Industries

Sahibabad, India
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Patnaik A.,N.I.T. | Kumar M.,N.I.T. | Satapathy B.K.,Indian Institute of Technology Delhi | Tomar B.S.,Allied Nippon Industries
Wear | Year: 2010

Hybrid phenolic composites based on combination of ceramic (alumino silicate based fibres) fibre and aramid fibre were fabricated followed by their characterization and tribo-evaluation in friction braking mode. The tribo-performance in terms of their friction-fade and friction-recovery behaviour has been rigorously evaluated while synchronously taking into account of the in situ braking induced temperature rise in the disc at the braking interface on a Krauss friction testing machine following ECE regulations. The friction-fade behaviour has been observed to be highly dependent on the fibre combination ratio i.e. fade followed a consistent decrease with the decrease in the ceramic fibre content, whereas the frictional fluctuations in terms of μ max-μ min has been observed to decrease with the increase in aramid fibre content. A higher recovery response is registered when the ceramic fibre concentration is adequately balanced with aramid fibre content. The analysis of friction performance has revealed that the fade and static friction response are the major determinants of overall frictional response whereas contributions from recovery and frictional fluctuations have been counterbalancing. The interdependence of fade-recovery-disc temperature rise-wear characteristics have been intensively analyzed and a semi-empirical "composition domain-performance attribute" thematic correlation is established. Worn surface morphology investigation using scanning electron microscopy (SEM) has been carried out which has revealed that the dynamics of formation-destruction of contact patches (friction-layers) and topographical attributes largely influence the friction and wear performance of such composite brake-pads. © 2010 Elsevier B.V.


Satapathy B.K.,Indian Institute of Technology Delhi | Patnaik A.,N.I.T | Dadkar N.,Indian Institute of Technology Delhi | Kolluri D.K.,Tribology Laboratory | Tomar B.S.,Allied Nippon Industries
Materials and Design | Year: 2011

Flyash-based fibre-reinforced hybrid phenolic composites filled with vermiculite were fabricated and characterized for their physical, thermal, mechanical and tribological performance. The performance were evaluated in terms of their friction-fade, friction-recovery, maximum disc temperature rise and wear behaviour on a Krauss friction tester conforming to the Regulation-90 as per the Economic Commission for Europe (ECE) norms. The fade behaviour has been observed to be optimally dependent on the flyash-vermiculite combination whereas the recovery remained broadly unaffected at ∼112±14%. Addition of vermiculite has contributed to the reduction in the maximum disc temperature rise whereas it enhanced the frictional amplitude, i.e μmax-μmin. The wear behaviour remains closely related to the trend observed in fade. The addition of vermiculite has caused an increase in the post-braking onset of degradation temperature of the surface composition as compared to the pre-braking composition. The analyses of friction and wear performance of the composites were carried out and major factors influencing the tribo-performance were identified. Worn surface morphology investigation using scanning electron microscope has revealed that the addition of vermiculite alters the compositional interactions at the braking interface leading to flyash-vermiculite combination specific topographical attributes responsible for tribo-performance evolution. © 2011 Elsevier Ltd.


Satapathy B.K.,Indian Institute of Technology Delhi | Patnaik A.,National Institute of Technology Hamirpur | Dadkar N.,Indian Institute of Technology Delhi | Rath P.,KIIT University | Tomar B.S.,Allied Nippon Industries
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology | Year: 2012

Friction composite materials based on combinatorial variations of fly ash and graphite were fabricated and evaluated on Krauss friction tester under inertia-braking mode following the ECE R-90 regulation. The frictional responses, such as friction fade at elevated temperatures and friction recovery on cooling, of the composites have demonstrated three regimes of friction evolution irrespective of the composition and the test runs. The composite with the highest fly ash content (i.e. 65 wt.%) and without graphite, shows the highest frictional performance, comparable frictional fluctuation, permissible fading but the highest wear with the highest rise in disc temperature. The composite with 60 wt.% fly ash in combination with 5 wt.% graphite showed higher frictional performance, permissible fading, lower wear volume and relatively lesser rise in disc temperature. However, the other composites having <60 wt.% fly ash and >5 wt.% graphite contents show unacceptable frictional level and friction-fade characteristics. Recovery performances of all composites remained above 100%. The study comprehensively established that composite material with <60 wt.% fly ash content in combination with ≤5 wt.% graphite content is functionally ideal to meet the desired performance requirements. Analysis of frictional data revealed the predominance of fade coefficient, whereas material coefficient remained minimally influential. Wear data analysis indicates that the inherent material factor predominates the wear performance followed by temperature-induced effects. Among the fade and recovery influences, the recovery coefficient has been observed to be predominant over the fade coefficient in the determination of the wear behaviour. Worn surface morphology revealed the role of topographical attributes in controlling the friction and wear performances. © IMechE 2012.


Kumar M.,N.I.T Hamirpur | Satapathy B.K.,Indian Institute of Technology Delhi | Patnaik A.,N.I.T Hamirpur | Kolluri D.K.,Tribology Laboratory | Tomar B.S.,Allied Nippon Industries
Journal of Applied Polymer Science | Year: 2012

Hybrid composite friction material based on ternary combination of potassium titanate whiskers, alumino-silicate ceramic fibers, and aramid fibers were fabricated and evaluated for their physical, mechanical, and tribo-performance. The frictional response, friction-fade, friction-recovery, and wear properties have been characterized on a Krauss friction tester following ECE R-90 regulation. Optimally, the composite with hybrid reinforcement incorporations in the form of ceramic-whiskers, ceramic-fiber, and aramid-fiber in the ratio of 13.75: 13.75: 2.5 has potentially been explored as a functionally feasible friction-material for braking applications. The interdependence of fade, recovery, disc temperature rise, and wear characteristics is established via thematic correlation diagram. © 2011 Wiley Periodicals, Inc.


Kumar M.,National Institute of Technology Hamirpur | Satapathy B.K.,Indian Institute of Technology Delhi | Patnaik A.,National Institute of Technology Hamirpur | Kolluri D.K.,Tribology Laboratory | Tomar B.S.,Allied Nippon Industries
Tribology International | Year: 2011

Composite friction materials based on synergistic ternary combination of potassium titanate whiskers, aramid fibre and graphite have been characterized for friction braking performance on Krauss friction tester. The dynamics of friction build-up and friction-decay as a function of number of braking instances and modes of braking cycles have been found to be more consistent in the composites with <7.5 wt% of aramid fibres whereas the absolute friction effectiveness remained higher in the composites with <25 wt% of potassium titanate whiskers. Wear surface morphology has revealed topographical variations and their underlying role in controlling the friction and wear performance. © 2010 Elsevier Ltd. All rights reserved.


Dadkar N.,Indian Institute of Technology Delhi | Tomar B.S.,Allied Nippon Industries | Satapathy B.K.,Indian Institute of Technology Delhi | Patnaik A.,N.I.T.
Materials and Design | Year: 2010

Friction composites based on several combinations of flyash and inorganic mineral rock fibres such as lapinus™ fibre were fabricated, characterised and tribo-evaluated. The tribo-performance in terms of their friction-fade and friction-recovery behaviour has been rigorously evaluated while synchronously taking into account of the in situ braking induced temperature rise in the disc at the braking interface on a Krauss friction testing machine following pulse velocity wave (PVW) 3212 norms as per the Economic Commission for Europe (ECE) regulations. The fade behaviour has been observed to be highly dependent on the combination of flyash-lapinus fibre e.g. fade remained maximum (45%) in the composite with the highest amount of lapinus fibre content and lowest amount of flyash whereas the frictional fluctuations in terms of μmax - μmin has been observed to be higher in case of low flyash-high lapinus fibre combination. The recovery response seemed unaffected by the disparity of ingredients and remained consistently stable within the range of 112 ± 2%. The analysis of friction and wear performance has revealed that flyash along with lapinus fibre provide thermo-mechanical stability and overall mechanical integrity to the system causing reduction in friction-fade whereas wear was found to be more recovery-controlled and less fade controlled. Worn surface morphology investigation using SEM has been carried out which has revealed that the interplay of flyash-lapinus combination and topographical attributes vis-a-vis dynamics of contact patches (formation-destruction) largely influence the friction and wear performance of such composites. © 2009 Elsevier Ltd. All rights reserved.

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