Home Kovove Materialy-Metallic Materials 2013 Metallic Materials Vol. 51 (2013), no. 4, pp.235-239

Journal info

Select Journal







Webshop Cart

Your Cart is currently empty.

Info: Your browser does not accept cookies. To put products into your cart and purchase them you need to enable cookies.

Metallic Materials Vol. 51 (2013), no. 4, pp.235-239

Title: Investigation of microstructure and properties near the interface of copper/aluminum brazed joint
Author: C. Z. XIA, Q. H. LIANG, D. F. CHEN

Abstract: Brazing of copper to aluminum using Al-Si alloy has been carried out in a resistance furnace. Microstructure and properties for Cu/Al brazing joint were studied by metallography, scanning electron microscope (SEM) and INCA energy disperse spectroscopy. Experimental results obtained showed that a reliable joint could be formed with the technology parameters: brazing temperature T = 610 °C∼625 °C, holding time t = 2∼3 min and pressure P = 0.4∼0.8 MPa. An obvious transition layer of intermetallic (IMC) with a thickness about 10 µm was formed near the interface of copper and the brazing alloy. Eutectic phase α(Al)-CuAl2 and needle-like precipitates (AlCuSi phase) were found in the brazing seam region. Furthermore, an external pressure was helpful to the brazing progress, however, microhardness in the brazing seam region was too high with a big external pressure. A peak point of microhardness was found at the interface of Cu/Al brazing joint, and the transition layer of IMC phases became the initiation and propagation channel of micro cracks.

Keywords: Al/Cu joint, interface, microstructure, microhardness, cracks
Published online: 20-Sep-2017
Year: 2013, Volume: 51, Issue: 4 Page From: 235, Page To: 239
doi:10.4149/km_2013_4_235


download file



© AEPress s.r.o
Copyright notice: For any permission to reproduce, archive or otherwise use the documents in the ELiS, please contact AEP.