Friction and wear properties of hot pressed (Ti,Cr)B2 + MoSi2 composite in sliding against WC ball

Research output: Contribution to journalArticlepeer-review

Authors

  • T.S.R.C. Murthy
  • P.K. Limaye
  • J.K. Sonber
  • K. Sairam
  • A. Nagaraj
  • And 4 others
  • C. Subramanian
  • N.L. Soni
  • R.J. Patel
  • R.C. Hubli

Colleges, School and Institutes

External organisations

  • Bhabha Atomic Research Centre

Abstract

Friction and wear properties of the hot pressed composite of pre-alloyed (TiCr)B2 + 20%MoSi2 (4.81 g/cm3) were studied at different loads and frequencies under reciprocative sliding, using a counter body of cemented tungsten carbide (WC-Co) ball. Coefficient of friction, wear volume and wear rate were measured. Optical microscopy and SEM-EDS analysis were carried out to understand the wear mechanism and chemistry of debris. A lowest value of coefficient of friction (COF) was measured as 0.38 at 10 N load and 10 Hz frequency. At 15 Hz frequency, the increase in load from 3 N to 10 N results in reducing the COF from 0.56 to 0.39. One order decrease in magnitude of specific wear rate was observed with an increase in load from 3 N to 10 N. Abrasive wear was the main mechanism identified in both flat and counter body materials. Severe wear was seen in counter body material (WC-Co) compared to base material of (Ti0.85Cr0.15)B2 + 20%MoSi2 composite.

Details

Original languageEnglish
Pages (from-to)276-283
Number of pages8
JournalInternational Journal of Refractory Metals and Hard Materials
Volume43
Early online date28 Dec 2013
Publication statusPublished - 1 Mar 2014

Keywords

  • Pre-alloyed (TiCr)B2 + MoSi2 composite, Reciprocative sliding wear, COF, Wear rate, WC-Co counter body, Abrasive wear