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Open AccessArticle

Study of Zn6Al6Ag Alloy Application in Ultrasonic Soldering of Al2O3–(Al/Al2O3) Joints

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Faculty of Materials Science and Technology Trnava, Slovak University of Technology in Bratislava, Jána Bottu No. 2781/25, 917 24 Trnava, Slovakia
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FMT—Faculty of Materials Science and Technology, 17. listopadu 15, 708 33 Ostrava, Poruba, Czech Republic
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Author to whom correspondence should be addressed.
Metals 2020, 10(3), 343; https://doi.org/10.3390/met10030343
Received: 23 January 2020 / Revised: 27 February 2020 / Accepted: 1 March 2020 / Published: 4 March 2020
The aim of this research is to characterize the soldering alloy Zn6Al6Ag, and to study the ultrasonic soldering of an Al2O3/metal–ceramic composite (Al/Al2O3). Zn6Al6Ag solder presents a quasi-eutectic structure with a melting point around 425 °C. The solder microstructure consists of a (Zn) + (Al) matrix, reinforced with a silver AgZn3 phase. A bond with the metal–ceramic composite was formed due to the dissolution of Al in the liquid Zn solder. The Al2O3 particles were put into motion, and a new composite was formed on the boundary. The Zn6Al6Ag solder also wetted the surface of the Al2O3 ceramic. A decisive effect on bond formation was caused by zinc and aluminum, whose oxides were combined with the oxides of ceramic material during in-air soldering. An adhesive bond was formed. The average joint shear strength of Al2O3/metal–ceramic composite (Al/Al2O3) was found to be 23 MPa. View Full-Text
Keywords: ultrasonic soldering; Zn solder; Al2O3 particles; shear strength; boundary ultrasonic soldering; Zn solder; Al2O3 particles; shear strength; boundary
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MDPI and ACS Style

Kolenak, R.; Kostolny, I.; Drapala, J.; Babincova, P.; Pasak, M. Study of Zn6Al6Ag Alloy Application in Ultrasonic Soldering of Al2O3–(Al/Al2O3) Joints. Metals 2020, 10, 343.

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