Tribology is a derivation of the Greek word "Tribos" which means "rubbing". The activities of this research group cover areas where: - wear occurs due to surfaces which rub against each other (sliding wear) - particles may be entrained in the contact (3 body wear) - particles may cause impact on the surface (erosion) or gouge out the surface (abrasion) - where wear occurs due to formation and collapse of bubbles of air at high pressures (cavitation). particles may be entrained in the contact (3 body wear) particles may cause impact on the surface (erosion) or gouge out the surface (abrasion) and where wear occurs due to formation and collapse of bubbles of air at high pressures (cavitation).