The Microstructural Effects on the Mechanical and ThermalProperties of Pulsed Electric Current Sintered Cu-Al2O3 Composites

✍ Scribed by R. Ritasalo; X.W. Liua; O. Söderberg; A. Keski-Honkola; V. Pitkänen; S-P. Hannula

• Publisher: Elsevier
• Year: 2011
• Tongue: English
• Weight: 943 KB
• Volume: 10
• Category: Article
• ISSN: 1877-7058
• DOI: 10.1016/j.proeng.2011.04.023

✦ Synopsis

In this work, the influences of the microstructure on the mechanical and thermal properties of pulsed electric current sintered (PECS) Cu-Al 2 O 3 composites are investigated. The process parameters were optimized for four different grades of composite powders to obtain dense samples (98-99.6 %T.D.). Higher hardness and better thermal stability were attained to the samples compacted from commercial internally oxidized (IO) powders than to the compacts made from the chemically synthesised experimental powders. This difference was attributed to the distribution and size of Al 2 O 3 -particles in the two types of composites. The CTE values of all the compacts were between 17 and 20 x 10 -6 K -1 (370-770 K). The results show that PECS can be used to produce dense high quality Cu-Al 2 O 3 composites.