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The wear characteristics and related mechanisms of the middle plate of a coal conveyor chute were investigated. Multiple sets of wear tests were performed in order to simulate the range in working conditions of the super heavy-load scraper conveyor. Three compositions of mixed material (coal, gangue and water) were tested at different contact pressures and sliding speeds. The results indicate that...
Oxyfluorinated graphene (OFGR) was incorporated in 0, 0.75, 1, 2, 4 and 7 vol%, respectively, in polytetrafluoroethylene (PTFE) via solvent-assisted dispersion prior to sintering. PTFE/OFGR nanocomposites were subjected to dry sliding tests using a ring (metal)-on-plate (PTFE) configuration. The steady dynamic coefficient of friction and specific wear rate data were determined. The coefficient of...
The effects of two different reinforcements of WC and graphene on the structural and tribological properties of copper matrix were investigated. Cu/WC, Cu/graphene and hybrid Cu/WC/graphene nanocomposites were co-deposited by electrophoretic deposition to improve both electrical and tribological behaviors. The friction and wear behaviors of WC and graphene reinforced nanocomposites were investigated...
The wear mechanisms during dry sliding of two representative tool steel grades, one of lower and one of higher percentage of carbide-forming elements—AISI H13 hot work and Cr–Mo–V cold work steels respectively—were investigated. Prior to testing, both grades were properly subjected to heat treatments aiming to their hardening up to final values of 40, 45 and 50 HRC. After heat treatments, a part of...
The traditional method of using the continuous variation of the friction coefficient with sliding distance to monitor the tribological properties between the contacts of soft metal films is generally low in sensitivity. This paper proposed the novel method of using instead the continuous variation of tribo-electrification voltage. This method was investigated experimentally for the dry friction sliding...
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