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In electrical motors electrical energy is transformed into mechanical energy or vice versa. Electrical energy has to be transferred from a stationary component into a moving one, which is done by a copper commutator in sliding contact with carbon brushes. Wear occurs at surfaces of both...
Commercial oil fortifier was added to fully‐formulated crankcase oils, and their performance, in terms of friction, wear and, most importantly, the role of the additive protective layer on the sliding surfaces, was investigated. Tests were performed on a pin‐on‐disc machine using steel and steel...
The wear of a machine element, whether it is due to fatigue or abrasive wear, will add contaminants in the form of particulates to the system. If a machine element is starting to wear out it will produce a large amount of particles and it will finally break down. Since this can be very costly,...
The lateral force mode of atomic force microscopy (AFM) was applied to conduct friction tests on a filled PTFE/PPS‐composite blend. This method distinguishes between the individual phases of the blend, i.e. carbon fibers, PPS‐particles, PTFE‐matrix and graphite flakes. The relative frictional...
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