Abstract
The microstructure of Cu-Al composite plate based on the cast-rolling technology is investigated by scanning electron microscope, x-ray diffractometer, energy-dispersive spectroscopy and transmission electron microscopy. The interfacial structure is analyzed by high-resolution transmission electron microscopy. The results show that the copper-aluminum composite plates with oxygen-freed metallurgical bonding interface by cast rolling. The interfacial intermetallic is CuAl2 with a thickness of 0.35 mu m. There is a crystallographic orientation relationship between the matrix Al and CuAl2. The (200) crystal plane of CuAl2 parallels to the (111 over bar) crystal plane of Al with the mismatch of 0.22.