抄録
In this paper, the wear behavior of MgO single crystals sliding on steel (S15C) at sliding speeds of 10-50 m/s has been described. It was found that two states, which were transient and steady states, were observed in this wear. When the sliding speed was below 20 m/s, two states of the wear appeared, while there was only a steady state of wear at 50m/s. These changes in the wear behavior are due to the transfer of MgO fragments and the oxidation of steel surface caused by the temperature rising at the interface of sliding as it is supposed from the observations of steel surface.
At the speed up to 50 m/s, the generation of thin film was observed on both the wear surfaces of MgO and steel. This result suggests that the solid state diffusion between MgO and oxidized iron caused by mechanochemical reaction occurred in the interface.
