METHOD FOR CREATING STRUCTURAL GRADIENT POWDER MATERIALS Russian patent published in 2021 - IPC B22F9/12 B22F1/02 B22F9/02 

FIELD: powder metallurgy.

SUBSTANCE: invention relates to powder metallurgy, in particular to the production of structurally gradient powder materials in the form of composite particles with a core-shell structure. The side surface of the rotating cylindrical workpiece is heated in a vacuum chamber to the melting point using an electron or laser beam. By spraying due to centrifugal forces, a stream of droplets of molten core metal is formed. In the path of the molten metal flow, the cores create a cloud of shell metal vapors by means of at least three magnetron or thermal sprayers. The sprayers are placed along the perimeter of the chamber symmetrically relative to the direction of the melt droplet spread, while their axes are directed at an angle of less than 90° to the direction of particle spread. Due to the condensation of shell metal vapors on the surface of core metal particles during the passage of core metal melt droplets through the shell metal vapor cloud, composite particles are formed and cooled in flight to ensure crystallization.

EFFECT: invention provides the production of structurally gradient powder materials of the core-shell structure with an adjustable uniform shell thickness during a continuous technological process.

1 cl, 2 dwg, 1 ex