Co-doped Effects on Tungsten Copper Electrode

Tungsten copper electrodes are usually activated sintered by porous tungsten skeleton pre-sintering or mixed powder with active elements. Generally, due to tungsten does not dissolved in the liquid phase copper, which lead to the porosity of high tungsten content of the composite material and has a bad effect on the process of densification. In order to reduce the porosity, we can take advantage of additives which dissolves tungsten.

Adding activate element to promote tungsten dissolution, and of the solid phase sintering and liquid phase diffusion densification during sintering tungsten particles dissolved in the liquid phase precipitation, round and accumulation, to obtain a high density. Its addition can remarkably improve the material properties, reduce the sintering temperature and shortening the sintering time. However, the addition of these elements will be activated in a certain extent, reduce the thermal conductivity and electrical conductivity of tungsten copper electrode. Therefore, this kind of method is suitable for the occasions, which has lower demands of thermal conductivity and electrical conductivity.

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