Tribological properties of MoSi2 against AlSl10045 steel under sliding friction

The sliding friction and wear properties of intermetallic MoSi2 against AISI1045 steel under dry friction and oil lubrication conditions were investigated with a MRH-5A type ring-block wear tester. The elemental composition, microstructure and worn surface micrographs of MoSi2 were observed and analyzed by means of scanning electron microscopy (SEM) and X-ray diffraction (XRD). Results show that oil lubrication can obviously improve the tribological properties of MoSi2, and the bigger the pv value, the greater the antifriction and the abrasive resistance of MoSi2 under oil lubrication. With the increase of pv value, the wear mechanism of MoSi2 under dry sliding friction is fatigue fracture and adhesive wear, sequentially, however under oil lubrication it is mainly fatigue pitting.