Effects of In on Wettability,Interfacial Structure and Properties of Sn-Cu-Ni Solder
Different contents of In were added to Sn-0.7Cu-0.1Ni solder,and the effects of In content on microstruc-ture,melting behavior,mechanical property,wetting property and interfacial reaction of the solder alloy were investi-gated.The results indicate that with the increase of In content,the melting point and microhardness of the solder alloy are decreased,meanwhile the tensile strength is increased,so the wettability is optimized.Meanwhile,the(Cu,Ni)6Sn5 phase layer tends to be thickened.