Microstructure and mechanical properties of Al-Cu joints diffusion-bonded with Ni or Ag interlayer

Relationship between Al-Ni intermetallic Phases and Bond Strength in Roll Bonded Steel-Aluminum Composites with Nickel Interlayers

“…Based on the presented results in Figure 14 it is suggested that an Al 3 Ni layer with a thickness between~3-5 µm is one of the main criteria for obtaining a high bond strength for the studied material combination. This observation corresponds well with the results reported in the study by Xiong et al [21] on diffusion bonded aluminum-copper composites with a nickel-interlayer. They reported that the thickness of the Al 3 Ni layer was below 3.8 µm and that this resulted in a high bond strength.…”

“…When choosing a metal interlayer, the metallurgical compatibility between the interlayer and the base metals is very important [20]. Since the interlayer is in contact with both base metals, new IMPs will be formed between the interlayer and either one or both of the base metals [16][17][18][19]21]. Thus, the use of metal interlayers has been reported to increase the bond strength, since the formation of the brittle and unwanted IMPs is eliminated.…”

“…Thus, the use of metal interlayers has been reported to increase the bond strength, since the formation of the brittle and unwanted IMPs is eliminated. In the literature, silver [16,17,19,21] and nickel [15,18,21,22] are the two most commonly investigated metal interlayers. Zhang et al [18] studied the effect of adding a nickel interlayer in aluminum-magnesium joints.…”

“…In both studies, the bond strength increased in the joints were a metal interlayer was added between the base metals, showing that both metals are suitable interlayer metals in aluminum-magnesium joints. Xiong et al [21] compared the microstructure and mechanical properties in aluminum-copper joints produced with both silverand nickel-interlayers. In their study, the highest bond strength was obtained when using nickel as interlayer, while the joints produced with silver as interlayer were observed to crack.…”

The Interfacial Characterization and Performance of Cu/Al-Conductive Heads Processed by Explosion Welding, Cold Pressure Welding, and Solid-Liquid Casting

“…Cu/Al composites structures are widely used in electric power, automobiles, electronics, hydrometallurgy, and other fields, due to their corrosion resistance and the light weight properties of Al, as well as the high electrical conductivity, high thermal conductivity, and low contact resistance of Cu [1][2][3][4]. For example, the batteries of electric vehicles require a high number of Cu/Al connections, and the hydrometallurgical cathode plates require Cu/Al composite conductive heads.…”