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Influence of thermal conductivity and thermal stability on the fade and recovery characteristics of non-asbestos semi-metallic disc brake pad

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Abstract

Thermal conductivity and thermal stability are the key requirements for friction materials. In this present work, three non-asbestos semi-metallic brake pads were developed using the same ingredients in the same proportion except by varying steel fibre by 30, 35, 41 wt%, synthetic barites contents by 11, 6, 0 wt% and designated as Na01, Na02, and Na03. The pads were tested for thermal stability and thermal conductivity. The various characterizations of the developed samples were done as per various industrial standards. The composites were tested for the fade and recovery characteristics using full-scale inertia brake dynamometer scheduled as per JASO C 406 standards. It was observed that composite Na03 proved to be the best with good thermal stability and thermal conductivity leading to low fade and high recovery characteristics. Scanning Electron Microscope and Atomic Force Microscopy helped to study the surface wear morphology of the developed samples.

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Abbreviations

TGA:

Thermo gravimetric analysis

TC:

Thermal conductivity

JASO:

Japanese automotive standards organization

ISO:

International organization for standardization

LOI:

Loss of ignition

SEM:

Scanning electron microscope

AFM:

Atomic force microscopy

IS:

Indian standards

NA:

Non-asbestos

ASTM:

American society for testing and materials

JIS:

Japanese industrial standards

MAX, MIN:

Maximum, minimum

°C:

Temperature

km/h, RPM:

Speed

m/s2 :

Deceleration

MPa, bar:

Pressure

kg/cm2 :

Shear Strength

kg ms2 :

Inertia

g/cc:

Density

mm:

Millimeter

µm:

Micrometer/microns

nm:

Nanometer

N:

Load (Newton)

wt%:

Weight percentage

µ:

Coefficient of friction (no unit)

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Acknowledgments

We thank Centre for Nanotechnology, Sathyabama University, Chennai (Mr. K. Viswanathan, Scientist C, Mr. Arulmaximus Rabel, Scientist C and Mr. D. Ramachandran, Scientist C) for helping us in doing SEM and AFM studies.

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Authors and Affiliations

  1. Department of Ceramic Technology, Anna University-ACT Campus, Chennai, 600025, Tamilnadu, India

    V. Thiyagarajan & K. Kalaichelvan

  2. Department of Production Engineering, National Institute of Technology, Tiruchirappalli, 620015, Tamilnadu, India

    R. Vijay & D. Lenin Singaravelu

Authors
  1. V. Thiyagarajan
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  2. K. Kalaichelvan
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  3. R. Vijay
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  4. D. Lenin Singaravelu
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Corresponding author

Correspondence to V. Thiyagarajan.

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Technical Editor: Alexandre Mendes Abrao.

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Thiyagarajan, V., Kalaichelvan, K., Vijay, R. et al. Influence of thermal conductivity and thermal stability on the fade and recovery characteristics of non-asbestos semi-metallic disc brake pad. J Braz. Soc. Mech. Sci. Eng. 38, 1207–1219 (2016). https://doi.org/10.1007/s40430-015-0448-8

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  • DOI: https://doi.org/10.1007/s40430-015-0448-8

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