Abstract
The reasons of increasing wear resistance of polytetrafluoroethylene-based composites as compared to pure polytetrafluoroethylene are analyzed. A significant difference in the filler concentration of the composite surface and in its bulk is demonstrated. The regions of the filler concentration on the composite friction surface can be additional regions of supplied power scattering that hinders the irreversible accumulation of defects which cause a concentration of stresses in the material. The validity of the proposed model is verified experimentally using metal-pure polytetrafluoroethylene and metal-composite friction pairs.
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