Experimental Study on Electrode Wear of Diamond-Nickel Coated Electrode in EDM Small Hole Machining

Table 6

Physical properties of materials.

Material	Melting point (°C)	Specific heat capacity (J/g·K)	Coefficient of thermal conductivity (W/m·K)	Electrical conductivity (S/m)	Work function (eV)
Brass	967	377	108.9	1.67 × 10^7	3.34–5.24
Copper	1083	386	386.4	5.95 × 10^7	5.24
Copper-tungsten alloy	3000–3410	—	220	2.5 × 10^7	4.54–5.24
Molybdenum	2620	255	142	1.93 × 10^6	4.37
Nickel	1453	452.2	59.2	1.43 × 10^7
Diamond	3550	399–472	2000	Almost nonconductive