A molecular dynamics simulation is performed to investigate the factional force and energy transfer dynamics associated with sliding hydroxylated alumina surfaces. The calculated coefficient of friction is in good agreement with a recent experimental study. The dynamics of energy transfer from the interface of the sliding surface is investigated by calculating the surface-surface intermolecular potential and the energy in surface hydroxyl groups. The simulations indicate the experimental friction force arises from energy relaxation. A transition from stick-slip to smooth sliding is observed as the sliding velocity is increased.
- Energy relaxation
- Molecular dynamics simulations
- Sliding surfaces
- Stick-slip sliding