METHOD FOR SYNTHESIS OF POWDERS WITH CORE-SHELL STRUCTURE Russian patent published in 2020 - IPC B22F9/14 B22F1/02 C23C16/513 

FIELD: metallurgy.

SUBSTANCE: invention relates to powder metallurgy, particularly, to plasma synthesis of powder with core-shell structure. Particles coated with a shell are fed into the reaction chamber by means of a vortex plasma flow; the cladding material is introduced in the form of a thermally unstable metal complex together with a vortex flow of stabilizing gas saturated with its vapours, the rotation frequency of which is higher than that of the plasma flow. Stabilizing gas flow and plasma flow move in reaction chamber between lower and upper electrodes. Synthesis is carried out in stabilizing gas flow by thermal decomposition of metal complex on heated surface of particles of initial powder, surface of which is coated with shell, and formation of solid metal shell on it. Particles with core-cladding structure are removed from reaction chamber by flow of stabilizing gas, and uncovered particles - by plasma flow.

EFFECT: increased amount of particles with core-cladding structure up to 80 wt % of all particles falling into plasma.

1 cl, 3 dwg