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505313 
Journal Article 
Warm compaction powder metallurgy of Cu 
Ngai, TWL; Wang, SL; Li, YY; Zhou, ZY; Chen, WP 
2005 
1 
Transactions of Nonferrous Metals Society of China
ISSN: 1003-6326 
15 
1 
77-81 
English 
A series of experiments were carried out using different admixed lubricant contents, different compaction pressures and temperatures in order to study the warm compaction of copper powder. Results show that too much admixed lubricant will lead to the squeeze out of the lubricant from the compact during the warm compaction processing of Cu powder. Results also show that blisters can be found in sintered samples that contain lubricant less than 0.15% (mass fraction). Optimal warm compaction parameters for producing high density powder metallurgy copper material are obtained. Compacts with green density of 8.6 g/cm(3) and a sintered density of 8.83 g/cm(3) can be produced by warm compacting the Cu powder, which contains 0.2% admixed lubricant, and is compacted at 145 degrees C with a pressure of 700 MPa. 
powder metallurgy; copper; warm compaction; lubrication; parameters; behaviors