Silver–carbon (Ag/C) contact materials with differenttypes of carbon, including diamond, graphite, carbon black, andcarbon nanotubes were fabricated by high-energy ball milling andhot-pressing. Their microstructures, arcing properties, and stabilityof the carbon structures were investigated. The results showthat Ag/C nanotubes material displays a scallop-like morphology,which is significantly different from the microstructure of otherAg/C materials with dispersed particles. During the process ofdischarge, the diamond and carbon black in Ag/C materials arepartially graphitized, while the morphology and crystal structureof graphite component have little change, indicating the graphitestructure of Ag/C materials is the most stable of all.