Tribological studies of monolithic chromium diboride against cemented tungsten carbide (WC–Co) under dry condition

Research output: Contribution to journalArticle

Authors

  • B. Bhatt
  • T.S.R.C. Murthy
  • P.K. Limaye
  • A. Nagaraj
  • K. Singh
  • And 5 others
  • J.K. Sonber
  • K. Sairam
  • A. Sashanka
  • G.V.S.N. Rao
  • T.S. Rao

Colleges, School and Institutes

External organisations

  • National Institute of Technology Warangal
  • Bhabha Atomic Research Centre

Abstract

Friction and wear behaviour of the hot pressed monolithic chromium diboride (CrB2) of 94% theoreticaldensity were studied at different loads (3, 5 and 10 N) and frequencies (10 and 15 Hz) under dry re-ciprocative sliding condition against cemented tungsten carbide (WC–Co) ball. Coefficient of friction andwear rate were calculated. While the value of coefficient of friction (COF) is decreased from 0.50 to 0.36with increasing load from 3 N to 10 N; it is observed to be nearly independent with respect to slidingfrequency. The measured wear volume is in the range of 0.67×103–2.24×103mm3for the investigatedregime. The lowest specific wear rate of 4.63×107mm3/N m was observed at 10 N load and 15 Hzfrequency. Abrasive and tribo-oxidative wear with delamination were the active mechanisms manifestedin bothflat and counter body materials.

Details

Original languageEnglish
Pages (from-to)15536-15546
JournalCeramics International
Volume42
Issue number14
Early online date1 Jul 2016
Publication statusPublished - 1 Nov 2016

Keywords

  • chromium diboride, cemented tungsten carbide, reciprocative sliding, wear rate, tribology, wear mechanisms