Tungsten Copper Electrode Powder Direct Sintering

With the rapid development of nanomaterials, powder granularity becomes smaller and sintering temperature is decreasing, which is beneficial for products densification. Using ultra-fine or nano tungsten copper powder can directly sinter at the lower temperature so that it is the new research direction of tungsten copper processing. The general process of powder direct sintering is that: W powder, Cu powder mixed + forming additives → forming →degreasing → sintering → after-processing. Therefore, researchers start their study with ultra-fine powder manufacturing, molding process and sintering process.

1. Powder preparation

There are many methods of ultra-fine tungsten copper powder, mechanical alloying and co-reduction is the most popular. Mechanical alloying (MA), the powder technology invented by American in 1970s, which milling with W and Cu powder in ball grinder. During the milling, it uses inert gas for protection in case of powder oxidation.

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