Murthy, T. S. R. Ch.; Limaye, P. K.; Sonber, J. K.; Sairam, K.; Nagaraj, A.; Subramanian, C.; Soni, N. L.; Patel, R. J.; Hubli, R. C. (MPD;RTD;L&PTD)
Source
International Journal of Refractory Metals & Hard Materials, 2014. Vol. 43: pp. 276-283
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 inmagnitude of specific wear rate was observed with an increase in load from3 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.