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→Copper–Tungsten (CUWODUR) Materials
=== Copper–Tungsten (CUWODUR) Materials===
Copper–tungsten (CUWODUR) materials with typically 50-85 wt% tungsten are produced by the infiltration process with the tungsten particle size selected
according to the end application [[#figures4|(Figs. 43 5 – 758)]] (Figs. 2.138 – 2.141) (Table 2.39)''. To increase the wettability of the tungsten skeleton by copper a small amount of nickel < 1 wt% is added to the starting powder mix.
W/Cu materials exhibit a very high arc erosion resistance <xr id="tab:tab2.40"/> (Table 2.40). Compared to silver–tungsten materials they are however less suitable to carry permanent current.
