Synthesys of Cu-Al2O3 Metal Matrix Nano Composite From Cuo and Al Powders by Using High Energy Planetary Fast Milling

Cu-20%Vol Al2O3 matal matrix nano composite powder has been synthesized by using of high energy planetrary fast milling. Due to high exothermic reaction between CuO and Al powders، direct mixing of powders could not be done therefore، to solve this problem، Cu (Al) solid solution powder has been prepared to prevent against explosion in the milling chamber. It has to be mentioned that the mechanical alloying of Cu and Al (14% At.) with atomic ratio of 6:1 for 50 hours، cause to formation of Cu (Al) solid solution powder. After that CuO powder will be added to the powder mixture and milling will be continued to produce relevant composite after 100 hours. During this process، Al will be extracted from the Cu structure and with reaction by oxygen، will produce Alumina. In the other hand، Cu. (Al) solid solution turns back to the pure Cu. Presence of alumina particles (5~30 nm) have been demonstrated by TEM micrographs.