TRIBOLOGICAL PROPERTIES OF Cu-C COMPOSITES CONTAINING GRAPHENE, NANOTUBES AND GRAPHITE NANOPOWDERS
Journal Title: Tribologia - Year 2014, Vol 257, Issue 5
Abstract
Copper-carbon composite materials are very promising functional materials used as electrical contact devices due to their high electrical conductivity, thermal conductivity, and excellent wear resistance. In present study, the influence of carbon forms (carbon nanotubes, graphite nanopowder, graphene) on the properties of copper matrix composites was examined. The composites were fabricated via power metallurgy method. The optimal parameters of the hot-pressing process in a vacuum were fixed as follows: temperature 520°C, pressing pressure 600 MPa, time 10 min. The wear tests were performed using SRV (Schwingungs Reibung und Verschleiss) friction and wear tester with a reciprocating motion in dry conditions. The friction and wear behaviour of copper with 3% by volume of carbon were investigated. Scanning electron microscopy (SEM) was used to analyse the worn surfaces and debris, and the wear mechanism was discussed. The lowest friction and wear were obtained for the composites with graphite nanopowder and graphene.
Authors and Affiliations
Marcin CHMIELEWSKI, Jan DUTKIEWICZ, Anita MAŃKOWSKA-SNOPCZYŃSKA, Remigiusz MICHALCZEWSKI, Katarzyna PIETRZAK
Keywords
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