The development of wear-protective oxides and their influence on sliding friction

摘要: The friction behaviour of iron and Fe-Cr alloys in unidirectional reciprocating sliding motions at 293 K has been examined oxygen controlled partial pressure. During sliding, a progressive decrease coefficient accompanies the development compacted oxide films on metal surfaces, eventually resulting steady value about 0.6 when almost complete coverage is attained. This achieved more rapidly higher pressures. A model to account for experimental observations proposed, based growth clean surfaces wear particles between each traversal removal that during subsequent traversal. oxidized debris fragmented further form layer nominally constant thickness, area which increases progressively with number traversals. relates terms several interfacial metal, metal-oxide parameters. importance some these parameters frictional discussed light observations.