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In the present study, wetting behaviors of Sn-9Zn-xAl ternary lead-free solder alloys produced by the addition of Al in various amounts binary Sn-9Zn eutectic lead-free solder alloy (wt%) were investigated. Contact angles of alloys were measured by using of the sessile drop method. Microstructures, inter-metallic phases, and melting temperatures of alloys were characterized by optic microscope and...