Patent ID: 7226492

Claim:
Tungsten-based alloy material sintered at a high sintering power comprising tungsten, and additive elements soluble in nickel and selected from the group consisting of rhenium, molybdenum, tantalum, niobium, vanadium and mixtures thereof, wherein, after sintering in liquid phase at a temperature of around 1500° C., said temperature having been achieved in less than 15 minutes by raising the temperature by at least 100° C./minute and maintained for less than 15 minutes, said alloy material has: a two-phased α-γ microstructure that is fully densified, has negligible porosities, and a low mean grain size (Lα) and a contiguity (Cαα) that is very low with respect to the size of tungsten crystals in the alloy material, and a dispersion of micro-oxides for maintaining ductility.