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Owing to its superior mechanical properties, nanodiamond (ND) holds great potential to improve tribological characteristics of composites. In this study, we report on the wear and dry friction of epoxy-ND composites prepared from as-received and aminated ND across the length scale range from macro to nano. Comparison of macroscale, microscale, and nanoscale frictional behavior shows that ND is highly...
This study examines wear phenomenon occurring in high-current density self-mated metal copper sliding contacts in humid carbon dioxide environments. A custom tribometer built to test macroscopic (lightly loaded) brush and slip-ring sliding electrical contacts at relatively high speed and current density is described in the text. Data is presented as further evidence that at some elevated current density...
Decoupled graphite lubrication of monolithic silver brushes on a copper rotor was studied in an ambient air environment under current varying from 0A/cm 2 to 200A/cm 2 using a custom designed electrical contact tribometer. Bifurcation of the positive and negative brush wear rates was observed at a current density of 200A/cm 2 . Energy dispersive spectroscopy showed transfer...
Metal fiber brushes are of interest in many high current density applications due to their high conductivity and low wear rates in humid environments. The frictional properties and wear behavior of a copper fiber brush sliding against a copper counterface in humid environments under high current densities (180A/cm 2 ) were investigated at low sliding velocities (10mm/s). A linear reciprocating...
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