Wear minimization for highly loaded iron-based MMCs due to the formation of spongy-capillary texture on the friction surface

Abstract Worn surfaces of a wide range of metal matrix composites (MMCs) produced by various technologies were analyzed. High-resolution scanning electron microscope images at magnifications exceeding 3000 times were used for the analysis. This research considers the problem of formation of a specific spongy-capillary texture on friction surfaces of highly loaded iron-based MMCs. The texture provides a significant improvement of wear resistance. It was also found that the worn surfaces contain oil molecules in the iron matrix micropores as well as the copper phase or reinforcing particulates. MMCs components are transferred to the friction layer on the counter-body during friction. Interaction of the friction pair elements enhances a quick and effective running-up ability.