The effects of production parameters on the electrical resistivity of Cu/M7C3-M23C6 MMCs

In this study, the effects of production parameters on the electrical condu ctivity of the electrofriction material (Cu/M7C3-M23C6) for collectors have been investigated. For this reason; copper and FeCr powders (M7C3-M23C6) w ere mixed in a mixer in ratios of 5, 10, 15, 20, 30 and 40 wt.% FeCr for 3 h. The pressure was applied as 380, 635, 955 MPa to produce samples having 5 mm radius and 1 mm thickness. Also temperature was changed as 700, 800, 9 00 degreesC during sintering. After sintering, electrical resistivity measu rements, metaleographic investigations and energy dispersive spectrometry ( EDS) analysis of the samples have been taken. Finally, it was detected that electrical resistivity was decreased by increasing sintering temperature a nd compression pressure, and increased depending on additive (FeCr particul ates) amount. (C) 2001 Elsevier Science B.V. All rights reserved.