THIN FILM FORMATION AND DEFORMATION AT FIBER REINFORCED COMPOSITES

摘要

Classical wear and friction experiments on a pin on disc test rig with composite disc and steel pin, yield the formation of a thin film at the composite wear track, as a result of particles, falling from the edges of the wear track, being pressed against and later on into the composite surface, depending on the normal force and the underlying composite structure. This thin film deforms continuously, resulting in larger and darker wear particles at the edge of the wear track. A lowering of the coefficient of friction is achieved when the particles are re-adhered to the mating surface. A change in the composite structure (pultruded profile) yields change in film properties. This film got pressed out the wear track and parts of it are pressed into the surface, and the old value of the coefficient of friction reappears. The wear rate changes due to the film formation, and in respect with the coefficient of friction.