Friction and Wear Behavior of Single-Phase Fe2B Bulk under Dry Sliding Condition

The effects of normal load and velocity on the friction and wear behavior of single-phase Fe2B bulk have been investigated by optical microscopy, X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy. Results indicate that the friction coefficient and wear rate both decrease at first and then increase with increasing load and velocity, respectively. Attributed to the formation of a lamellar film on the Fe2B surface, the lowest friction coefficient and wear rate are obtained at a velocity of 0.2m/s under a load of 12N. The dynamic friction coefficients under loads of 4 and 12N are around 0.8 in the initial steady stage and then decrease to about 0.6, whereas the friction coefficient at 20N shows no obvious change and remains around 0.82. The lubricating film consisting of Fe2O3, B2O3, SiO2, and H3BO3 reduces the friction coefficient at 0.2m/s under a load of 12 N.