WCu composites consist of a porous tungsten matrix infiltrated with approximately 10 - 40 percent by weight of copper. Tungsten-Copper is very resistant to arc erosion, exhibits good electrical conductivity, a high level of thermal conductivity and low thermal expansion.
15.5 g/cm³ at 20 °C
Coefficient of thermal expansion α
8.3E-6 1/K at 22 °C
Thermal conductivity λ
235 W/(m·K) at 20 °C
WCu is used for the construction of high-voltage circuit breakers (marketed under the name Elmet®) and for erosion electrodes (marketed under the name Sparkal®). WCu composites are also used as base plates and heat spreaders in radar technology, optoelectronics and high frequency electronics.
This material data has been provided by Plansee.