Ni-doped Effects on Tungsten Copper Electrode II

Except cobalt (Co) element, Nickel (Ni) is also a kind of common additives, and the density, the hardness, the electrical conductivity and other comprehensive properties of tungsten copper electrode will be influenced by the content of Ni. According to the phase diagram of Cu-Ni and Ni-W as follow:

From the Cu-Ni and Ni-W phase diagram can visually see the nickel (Ni) and copper (Cu) is infinitely miscible, and tungsten W can be dissolved in Ni. Therefore, when tungsten copper composite powder mixed with Ni element, the porosity will decrease and the density and the hardness of tungsten copper electrode is improved. In addition, in the process of sintering, tungsten particles rearranged by the liquid Cu, which shortens the distance among the particles and further enhances the densification. Through SEM (Scanning Electron Microscope), we can find that the particle of skeleton is uniform and the granularity is finer. However, with the increasing content of Ni, the connectivity of tungsten skeleton will be better.

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http://news.chinatungsten.com/en/tungsten-information/81132-ti-10471

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