Abstract
The dissimilar ZrO2/Sn/Al butt joints were successfully achieved by ultrasonic-assisted soldering using a needle-shape acoustic horn at 350 °C. It was found that the bonding mechanism of the dissimilar butt joints was based on the interfacial sono-oxidation reactions leading to the formation of the amorphous Al2O3 layers of 6 nm and 12 nm thickness at the ZrO2/Sn and Al/Sn interfaces, respectively. The average tensile strength of the ZrO2/Sn/Al butt joints was tested to be 29.2 MPa.
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