Influence of Tin addition on the Microstructure, Melt Properties and Mechanical Properties of Ag-Cu-Zn-Sn Braze Filler

Abstract

The influence of Sn addition on the microstructure, melt properties and mechanical properties of Ag-Cu-Zn-Sn braze filler were investigated in this study. Microstructural analysis reveal that increase of Sn content with increased the eutectic phase and promote the formation of Cu 3 Sn intermetallic compound.The differential thermal analysis show that increase of Sn content dramatically decrease the melting temperature of the Ag-40Cu-1Zn-7Sn braze filler are 700 o C. The tensile strength and elongation of brazing joint was improved by increasing Sn content in braze filler.Index Terms-Ag-Cu-Zn-Sn braze filler, brazing, melt properties, microstructure, mechanical properties.

Effect of In and Pr on the Microstructure and Properties of Low-Silver Filler Metal

“…The decrease of Ag content will seriously affect the brazing performance of silverbased filler metals [8,9]. Thus far, many attempts have been made to solve the problem and to produce cadmium-free low-silver alloys that have similar characteristics of low melting point, excellent fluidity and high joint strength, several novel brazing filler metals have been developed, such as AgCuTi [10], AgCuZnMnNi [11], AgCuZnSn [12,13], AgCuZnSnIn [14], AgCuZnSnCe [15] and AgCuZnSnGa [16], which have resulted in the initial application and development of Cd-free silver-based filler metals in green manufacturing. Lai [17] has reported that the addition of Ga, Sn, In, and Ni can optimize the microstructure and mechanical properties of 30AgCuZn filler metal, but the Ag content is still very high.…”