Metallic Joining Technique of Insulated Copper Coil

A new barzing method was investigated in order to increase the strength of fusing joints of insulated copper wires. This process is a combination of fusing and brazing of brass terminal and insulated conner wires. The filler metal, the brass terminal and the wires were heated simultaneously by resistance heating, and they were bonded. The joint which was brazed at about 700°C using BCuP-5 (Cu-15%Ag-5%P) filler metal gave the best result. That joint fractured at the insulated copper wire (base metal) in tensile testing. A joint layer which consisted of mainly Cu, Ag, P and a little carbide was formed at the joint interface.