Study on Breakdown Probability of Multimaterial Electrodes in EDM

Table 1

Electron work function of common metals [16].

Materials	Electron work function, (eV)
Copper	5.24
Brass	3.34–5.24
Zinc	3.34
Iron	4.47
Copper-tungsten alloy	4.54–5.24
Tungsten	4.54