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Journal of the Australian Ceramic Society

, Volume 53, Issue 2, pp 611–625 | Cite as

Wear behaviour of CrB2 + 5 wt.% MoSi2 composite against cemented tungsten carbide (WC-Co) under dry reciprocative sliding condition

  • B. Bhatt
  • T. S. R. Ch. Murthy
  • A. Nagaraj
  • K. Singh
  • J. K. Sonber
  • K. Sairam
  • A. Sashanka
  • G. V. S. Nageswara RaoEmail author
  • T. Srinivasa Rao
  • Vivekanand Kain
Research

Abstract

In the present work, reciprocative sliding wear behaviour of CrB2 + 5 wt.% MoSi2 composite was studied against WC-Co ball using different normal loads (5, 10 and 20 N) and frequencies (10, 15 Hz) under dry condition. Coefficient of friction (COF) and wear rate were measured at all test conditions. Wear mechanism was analysed by micro-structural characterization. It was found that COF is decreased from 0.68 to 0.32 with increasing load (5 to 20 N) and reciprocating frequency (10 to 15 Hz). The wear rate measured was minimum at 10 N load and 15 Hz frequency combination and was found to be 1.06 × 10–6 mm3/N m. The wear mechanisms identified during reciprocative sliding wear of CrB2 + 5 wt.% MoSi2 composite were abrasion, micro-fracture and surface tribo-oxidative reactions with delamination from tribo-zone. While abrasion with mild oxidative wear is the dominant wear mechanism at lower load (5 N) and frequency (10 Hz) combination, intensive tribo-oxidative wear was observed at higher loads (>10 N) and frequency (15 Hz).

Keywords

Chromium diboride Molybdenum silicide Reciprocative sliding wear Coefficient of friction Wear mechanism 

Notes

Acknowledgements

The financial support by the Board of Research in Nuclear Science (BRNS) of the Department of Atomic Energy (DAE), Government of India (No. 2013/36/15-BRNS) is gratefully acknowledged. The authors would like to thank Mr. Sumanta Behra and Mr. Y. M. Thakur for their help in the sample preparation and schematic drawing. The authors also would like to acknowledge Dr. Amit Verma for micro-XRD analysis of wear debris.

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Copyright information

© Australian Ceramic Society 2017

Authors and Affiliations

  • B. Bhatt
    • 1
  • T. S. R. Ch. Murthy
    • 2
  • A. Nagaraj
    • 3
  • K. Singh
    • 2
  • J. K. Sonber
    • 2
  • K. Sairam
    • 2
  • A. Sashanka
    • 1
  • G. V. S. Nageswara Rao
    • 1
    Email author
  • T. Srinivasa Rao
    • 4
  • Vivekanand Kain
    • 2
  1. 1.Department of Metallurgical and Materials EngineeringNational Institute of TechnologyWarangalIndia
  2. 2.Materials Processing and Corrosion Engineering DivisionBhabha Atomic Research CentreMumbaiIndia
  3. 3.Laser and Plasma Technology DivisionBhabha Atomic Research CentreMumbaiIndia
  4. 4.Department of Metallurgical and Materials EngineeringNational Institute of TechnologyTiruchirappalliIndia

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