Metallurgical Analysis of Wear Particles and Wearing Surfaces.

摘要

The initial approach has been concerned primarily with the examination of particles recovered by the ferrographic technique from samples of lubricating oils taken periodically during tests and service of bearings,gears,sliding surfaces,etc.,in which such experimental variables as lubricants,lubricant additives,bearing materials,loads,etc.,have been studied. Examinations have been conducted principally using both scanning and transmission electron microscopy techniques,observing particle shapes,sizes,surface structures and other parameters as functions of distance along the ferrogram and determining a semi-quantitative elemental chemical analysis of selected and typical particles. These electron microscope techniques have been used to characterize the wear particles and associated surface degradation produced in the bearing and gear tests conducted by others. They provide information on particles and surface details too small for study by optical microscopy methods. (Author)