Effect of oxidation time on the short time oxidation behavior and tribological performance of bulk Fe₂B

The effects of oxidation time on the short time oxidation behavior and tribological performance of bulk Fe₂B have been investigated in this present study. The results reveal that oxidation weight gain, average roughness of oxidation surface and oxidation layer thickness increase with oxidation time increases. Micro-bulges appear and grow up gradually on the oxidation surface as the increasing of oxidation time. Oxidation produces consisting of α-Fe, Fe₂O₃, Fe₃O₄, FeBO₃, Fe₂OBO₃, B₂O₃ and H₃BO₃ are generated on the surface. At a relative speed of 0.075 m s^-1 under a normal load of 8 N, the values of friction coefficient and wear rate go down first, later go up, and then go down again. The lowest friction coefficient and wear rate can be obtained for the sample with 9 min oxidation treatment before friction.