Infiltration is kind of process that uses the metal or alloy which has lower melting point than the product to fill in the pores of products in molten state. For tungsten copper electrode, copper solution has lower melting point and it fill in the porous tungsten skeleton, which has excellent density and strength so that tungsten copper material has better properties, such as thermal conductivity, electric conductivity and high hardness.
The process is: Tungsten powder (W) + shaping agent (or adds Cu-induced powder) → tungsten skeleton (suppressing + degreasing + sintering) → copper infiltration (Cu) → after treatment. And the most research focus on:
1. Powder granularity
2. Tungsten skeleton
3. Infiltration process
4. After treatment.
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