Metal powders and a process for the production thereof

Details Metal powders and a process for the production thereof Metal powders and a process for the production thereof

1984-03-29

1985-08-13

Stallard, Wayland

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

By impinging or atomizing with gaseous jet or blast

425 6, 425 7, 264 13, B05B 708

Patent

active

045349177

ABSTRACT:
Pore-free metal powders, consisting of powder particles having a singly curved smooth surface and a mean diameter of between 5 and 35 microns are made by providing a container having an inflow opening; flowing metal melt and gas, at a temperature ranging from 0.7 to 1.5 times the solidification temperature of the melt in .degree.K, into the container through the inflow opening; maintaining the ratio of gas pressure within the container to gas pressure outside the container at the inflow opening at less than 1:5, thereby creating a supersonic flow of gas from outside the container, through the inflow opening, and into the container; and contacting the flowing metal melt with the supersonic flow of gas at a point near the inflow opening and thereby forming the melt into threads which subsequently and spontaneously collapse to form the powder particles.

REFERENCES:
patent: 3549531 (1970-12-01), Santt
patent: 3719733 (1973-03-01), Rakestraw et al.
patent: 4233062 (1980-11-01), Siddall
patent: 4402885 (1983-09-01), Roehrig et al.
patent: 4469313 (1984-09-01), Ichidate et al.

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