Materials Science Forum, Vol.510-511, 874-877, 2006
Process development for cost-effective Ag-Ni contact materials by simple solidification control
Ag-Ni is well known as contact materials with high workability and low contact resistance for medium to weak current contacts. However, Ag-Ni contact materials are difficult in controlling the Ni content, because Ag-Ni alloys exhibit no range of solid solubility of Ni in all temperature range. The purpose of this research is to develop a process for cost-effective Ag-Ni contact materials based on simple solidification control. The hardness of Ag-Ni contact materials produced by simple solidification control was higher than that of Ag-Ni contact materials produced by conventional powder metallurgy and coprecipitation method. The higher hardness value of contact materials produced by simple solidification control may be attributed to the uniform distribution and small size of Ni particles in Ag matrix. The properties of produced contact materials can be further improved by solidification process control.