LAUSR

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 μm. There is a crystallographic orientation relationship between the matrix Al and CuAl2. The (200) crystal plane of CuAl2 parallels to the (111¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$11\bar{1}$$\end{document}) crystal plane of Al with the mismatch of 0.22.