Heavy tungsten alloys on basis of nano powders
From nano powders of heavy tungsten alloy of W-Ni-Fe-Co system (the size of particles about 100 nanometers), synthesized by process of hard-phase sintering, it is received a compact material with density of ~17,4 g/sm<sup>3</sup> and size of tungsten grain 2,4-4,6 microns. The tungsten alloy from nano powder has higher mechanical properties, than standard alloys: hardness by Vikkers of alloy from nano powders in 2.5 times higher than a factory alloy after liquid-phase sintering and in 1,4 times higher, than a factory alloy after additional strengthening processing. Yield strength and compressive strength at room temperature of fine-grained tungsten alloys received from nano powders by solid-phase sintering at 1350°С, accordingly on ~55 and ~35% is higher, than factory alloys.