An Investigation on Vacuum Brazing of Dissimilar Nonferrous Metals of Cu and Al

Abstract:

The writer successfully obtained brazed Cu-Al joint by using vacuum brazing method, and also conducted an analysis for the microstructure morphology of the joint. The result shows that: The interface of the brazed Cu-Al joint includes three parts---the transition area on the Cu side, the central brazing seam area and the transition area on the Al side. Formed between the brazing seam area and the Cu substrate are the Cu₃Al₂ and CuAl₂ layers, and the average width of the transition area of Cu₃Al₂ is 12 μm while that of CuAl₂ 8 μm. The brazing seam area is mainly composed of α-Al solid solution, Cu₃Al₂ and CuAl₂ metal compounds, in addition, the ε-Cu₁₅Si₄ phase, the Al-Si phase and CuZn₂ phase are also formed. These phases present themselves in the state of acicular compounds, which are dispersed in the brazing seam area.

• Periodical: Advanced Materials Research (Volumes 690-693)
• Pages: 2565-2569
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.690-693.2565
• Online since: May 2013
• Authors: Wei Yuan Yu, Tian Dong Xia, Wan Wu Ding, Xiao Jun Wang, Wen Jun Zhao
• Keywords: Aluminum (Al), Cu, Microstructure, Vacuum Brazing

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