Study on Interface Microstructures of Cu-Al Composite Plate Fabricated by Cast Rolling
- PDF / 1,707,225 Bytes
- 7 Pages / 593.972 x 792 pts Page_size
- 23 Downloads / 166 Views
JMEPEG https://doi.org/10.1007/s11665-019-04451-y
Study on Interface Microstructures of Cu-Al Composite Plate Fabricated by Cast Rolling Ya-zhou Liu, Wen-yan Wang, Ya-bo Huang, Jing-pei Xie, Ji-yao Liu, Lei-ming Guo, and Miaofei Zhang (Submitted September 8, 2018; in revised form August 23, 2019) 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 lm. There is a crystallographic orientation relationship between the matrix Al and CuAl2. The (200) crystal plane of CuAl2 parallels to the (111) crystal plane of Al with the mismatch of 0.22. Keywords
cast rolling, Cu-Al composite plate, interface, semi-coherent interface
1. Introduction With the development of science and technology, a singleperformance material cannot meet the requirements of modern industry. Bimetallic composite materials can combine the advantages of various components, resulting in a better performance in general (Ref 1, 2). The Cu-Al bimetallic composite plates have the excellent electrical conductivity, thermal conductivity of the copper and lightweight, corrosion resistance and economy of aluminum (Ref 3). Therefore, Cu-Al bimetallic composite plates can be applied not only to the field of signal transmission and power transmission, but also widely to aviation, petroleum, chemical, shipbuilding and other industrial areas (Ref 4-6). At present, Cu-Al composite materials can be produced through Cu-Al surface welding (Ref 7), explosive composite (Ref 8), rolling composite (Ref 9), core continuous casting (Ref 10), etc. However, cast-rolling method has more advantages, such as low energy consumption, cost-effectiveness and good quality. Without changing the original conductivity of Cu and Al, the cast-rolling composite technology can achieve metallurgical bonding between copper and aluminum interfaces and obtain high interfacial bonding strength. Some intermetallic compounds, such as CuAl2, Cu9Al4 and CuAl, would be formed in the composite process of high-temperature aluminum liquid and copper plate. The secondary intermetallic compound formed under extreme conditions significantly deteriorates the interfacial bonding strength of the composite (Ref 11, 12), Ya-zhou Liu, Wen-yan Wang, Ya-bo Huang, Jing-pei Xie, Jiyao Liu, Lei-ming Guo, and Miaofei Zhang, School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003 Henan, China; and Collaborative Innovation Center of Nonferrous Materials of Henan Province, Luoyang 471003 Henan, China. Contact e-mail: [email protected].
Journal of Materials Engineering and Performance
resulting in a decrease in bonding strength and
Data Loading...
