Abstract
In the development of friction materials and their evaluation it is necessary to predict and to record quantitatively the friction and wear effects during contact. This paper investigates the correlation between the wear resistance of composite brake materials and the coefficient of friction, the nominal pressure per unit area, the relative velocity, the mechanical properties of the material and the coefficient of reciprocal covering. Investigations were carried out on a specially designed machine. Microscope and X-ray investigations of the disk surfaces of both elements and of the wear products revealed that friction phenomena associated with brake material-metal combinations are complex. Abrasive, adhesive and thermal wear, whose share in the total balance of the mechanism of wear changes, occur depending upon the temperature and the nature of the superficial surface layer generated.
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