We employ powder metallurgy to manufacture high-voltage tungsten-copper contacts:
- out of the mixture of W and Cu (high copper content)
- by the infiltration of a tungsten matrix with copper (low copper content)
The starting powders have a high purity (W ≥ 99.9%), fine electrolytic Cu powderes. Because of its properties (Table 2) W-Cu is used for:
- electrical contact materials
- welding and erosion electrodes
Table 2: W-Cu
properties
| COMPOSITION |
γ
g/cm3 |
HARDNESS
HV |
El - conductivity
mΩ/mm2 |
| W-Cu 80/20 |
min 15,2 |
≥ 210 |
16-20 |
| W-Cu 75/25 |
min 14,6 |
≥ 180 |
17-21 |
| W-Cu 70/30 |
min 13,9 |
≥ 160 |
18-22 |
Alloy composition and product form are produced according to customer demand.
W-Cu products can also be cast in brass, aluminium, etc.