Abstract: A copper graphite composite material suitable for use in applications such as brushes, switches and contact materials for rail systems and other industrial devices. The composite comprises a copper network matrix having a plurality of pores containing graphite. The composite may have an IACS value of at least 40% which may even be higher than 70% and a density value of at least 6.0 g/cm3. The method for preparation of the composite comprises mixing graphite and copper powder under non-oxidising conditions, compacting the mixture and sintering under non-oxidising conditions.
Type:
Grant
Filed:
September 7, 2001
Date of Patent:
January 20, 2004
Assignees:
Victorian Rail Track
Inventors:
Da Hai He, Rafael R. Manory, Norman J. Grady, Harry Sinkis, Clim Pacheco