This is from Intatech: http://intatech.com/CuW.html
Copper tungsten is used for primarily three reasons:
1. Matching coefficient of thermal expansion to a mating material
2. Thermal conductivity for heat sinks
3. Density for RF shielding
There are two formulation processes for CuW
1. Powdered Metal:
A blending of tungsten, copper and various binders are formed under high pressure and then sintered at high temperatures where the material becomes fully dense.
2. Infiltration:
The process of infiltrating copper into a tungsten skeleton. This process is performed under pressure and high temperature.
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