Journal of Advanced Materials in Engineering

Journal of Advanced Materials in Engineering

Investigating the Properties and Behavior of Ag-Cu-Ti-Sn-%5.1 Zr Filler Metal in Dissimilar Bonding of Alumina to Copper

Document Type : Original Article

Authors
M. Taheri 1
Gh. Azimi Roeen 2
A. Bahrami 1
1 Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
2 Center of Engineering and Technical Skills Training, Isfahan University of Technology, Isfahan 84156-83111, Iran
10.47176/jame.44.1.1075
Abstract
This study was intended to investigate the synergistic effect of zirconium element on the active filler metal, using a multi-component filler alloy. The bonding of alumina to copper was investigated using active filler metals, namely Ag-Cu-Ti-Sn and Ag-Cu-Ti-Sn-%5.1Zr, using the induction brazing method. Alumina/copper joining was done with active filler metals of Ag-Cu-Ti-Sn and Ag-Cu-Ti-Sn-%5.1Zr at temperatures of 840 and 880 °C, respectively, for 15 min under vacuum of 10-6 millibar. The microstructure of the joints were assessed using optical and scanning electron microscopes, equipped with energy dispersive spectroscopy and the mechanical properties of the joints were evaluated using the shear strength and the Vickers microhardness tests. Two phases of TiO and Cu3Ti3O were detected in the reaction layer area in alumina-copper joint with Ag-Cu-Ti-Sn filler metal. Ag-Cu eutectic compounds were also found in the brazing zone. In alumina-copper joint with Ag-Cu-Ti-Sn-%5.1Zr filler metal, two phases of TiO and ZrO2 were observed in the reaction layer area, and two phases rich in copper and silver were observed in the brazing zone. The shear strength, obtained in brazing joint with Ag-Cu-Ti-Sn-%5.1Zr filler, was 33% higher than that of in the brazing joint with Ag-Cu-Ti-Sn filler. The microhardness in the region of the reaction layer of the joint with filler metal containing 5.1 wt.% of zirconium and that without zirconium was measured as 248 and 146 Vickers, respectively.
Keywords
Active filler metal
Induction Brazing
Alumina
Microstructure
Mechanical properties
Subjects
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Journal of Advanced Materials in Engineering
Volume 44, Issue 1
2025
Pages 15-30

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