Abstract
Results of sliding experiments under high normal pressure using a sapphire ball on a modified Brinell hardness testing machine and different work materials are reported. A rational approach to the mechanism of metal build-up on Al 2O 3 abrasive developed recently has been extended in the present sliding tests to verify the hypothesis, and good agreement was found. The results of this study show a wide range of behaviour relative to the equilibrium level of friction and the time required to reach equilibrium when different materials are rubbed against the sapphire ball.
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