Origin of Friction (IMAGE)

National Institute for Materials Science, Japan

Origin of Friction

Caption

We removed moisture from the space between the muscovite surfaces by applying high pressure under dry conditions. We then measured frictional forces between the muscovite surfaces at different sliding positions. The results of this experiment closely coincided with frictional forces estimated using quantum mechanical calculations, indicating that the frictions occurring between clay minerals are controlled by atomic-scale electrostatic forces.

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