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

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

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

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

Keywords

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

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