Analyzing the morphology of worn surfaces in polymer matrix friction composites

This study examines the surface topography and wear mechanisms of polymer matrix friction composites used in brake pads. By analyzing microscopic images and three-dimensional surface wear profiles, the study identifies key wear processes and the formation of third body particles that influence the behavior of friction. The research used samples prepared by traditional methods of powder metallurgy based on phenol-formaldehyde. The experiments included friction tests under various conditions, and the results evidentiated distinct phases in the variation of friction coefficient, being illustrative of the composite's response to various stresses. The morphology of the surface after testing revealed several wear mechanisms, including abrasive and adhesive wear.