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Advances in Materials Science and Engineering
Volume 2016 (2016), Article ID 9796169, 10 pages
Research Article

Microstructure and Mechanical Behavior of Hot Pressed Cu-Sn Powder Alloys

Department of Production & Mechanical Design, Faculty of Engineering, Port Said University, Port Fouad, Port Said 42523, Egypt

Received 31 January 2016; Revised 26 March 2016; Accepted 30 March 2016

Academic Editor: Angela De Bonis

Copyright © 2016 Ahmed Nassef and Medhat El-Hadek. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Cu-Sn based alloy powders with additives of elemental Pb or C were densified by hot pressing technique. The influence of densifying on the properties of the hot pressed materials was investigated. The properties, such as the hardness, compressive strength, and wear resistance of these materials, were determined. The hot pressed Cu-Sn specimens included intermetallic/phases, which were homogeneously distributed. The presence of graphite improved the wear resistance of Cu-Sn alloys three times. Similarly, the presence of lead improved the densification parameter of Cu-Sn alloys three times. There was no significant difference in the mechanical behavior associated with the addition of Pb to the Cu-Sn alloys, although Cu-Pb alloys showed considerably higher ultimate strength and higher elongation. The Cu-Sn-C alloys had lower strength compared with those of Cu-Sn alloys. Evidence of severe melting spots was noticed in the higher magnifications of the compression fracture surface of 85% Cu-10% Sn-5% C and 80% Cu-10% Sn-10% Pb alloys. This was explained by the release of load at the final event of the fracture limited area.