Formation of nanoparticles of binary W-Cu and ternary W-Ni-Fe systems in thermal plasma jet

Thermal plasma-based processes are the effective technique for the production of nanoparticle of elements, their inorganic compounds and composites. The binary W (80 mass %) -Cu and ternary W (95 mass %) -Ni-Fe systems have been produced as nanoparticles by chemical condensation from gas in thermal plasma jet at atmospheric pressure. Powdered mixtures of metal oxides WO₃ - CuO and WO₃ - NiO - Fe₂O₃ are injected into hydrogen-nitrogen thermal plasma generated in DC arc plasma torch. Formation of nanoparticles occurs under auto quenching of high temperature flow in the reactor with confined plasma jet¹.