At present, superlubricity is one of the hottest researches due to it being close linked to the energy problems. In the work, we found that the superlubricity of silicone oil can be achieved between two surfaces (Si_3N_4/glass) by running-in with hydrogen ions. The super-low friction coefficient of 0.004 can be achieved. It is found that the superlubricity is closely linked to the topography of wear region on the ball, but has no direct relation with the topography of track on the glass. With the effect of hydrogen ions, the two friction surfaces can compose a micro-slope plane bearing and the silicone oil can form a hydrodynamic film under a certain speed, which is the origin of superlubricity.
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