Infiltration Temperature Effect on Tungsten Copper Electrode Properties II

Infiltration temperature controlling is crucial in the process of tungsten copper electrode, its rise and fall has a great effect on comprehensive performance of tungsten copper electrode. There is a graph of the relation of infiltration temperature and wetting angle as follow.

The graph remarkably shows that infiltration temperature plays an important role in diffusion effects. The higher Infiltration temperature, the smaller the infiltrate angle, easily viewed from the figure, the wetting angle decreases with increasing temperature, the surface tension increases with increasing temperature. Theoretically, when the temperature is 1350 ℃, θ = 0°, completely molten copper and tungsten wetting at this time, the infiltration effect is best. And the copper liquid viscosity decreases with increasing temperature, so the temperature can be increased to improve the infiltration of liquid copper flowability, enhanced capillary action, be conducive to infiltration.

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