Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1987-07-22
1988-10-25
Stallard, Wayland
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
264 12, 425 7, B22F 908
Patent
active
047801301
ABSTRACT:
A method for increasing the yield of fine and ultrafine powder from a metal or metal alloy, including such high surface tension metals and alloys as copper, Fe-based alloys, Cu-Al-Fe alloys and Ni-Cr-Fe-B-Si alloys. A pressurized stream of molten metal is atomized by a cone of impinging gas streams, the apex of the gas cone being less than 50 mm from the melt outlet and 11-24 mm from the gas orifices. The gas velocity is greater than 100 m/sec, and the mass flow ratio of melt to gas is less than 0.10. The melt stream is pressurized by introducing pressurizing gas to an overpressure zone above the melt, e.g. in a sealed crucible.
REFERENCES:
patent: 1635653 (1927-07-01), Williams
patent: 2402441 (1946-06-01), Paddle
patent: 2997245 (1961-08-01), Nillson et al.
patent: 3253783 (1966-05-01), Probst et al.
patent: 3344469 (1967-10-01), Bylund et al.
patent: 3430289 (1969-03-01), Aikawa et al.
patent: 3501802 (1970-03-01), Ullman et al.
patent: 3533136 (1970-10-01), Holtz
patent: 3592391 (1971-07-01), Bender et al.
patent: 3639548 (1972-02-01), Ullman et al.
patent: 3695795 (1972-10-01), Jossick
patent: 3752611 (1973-08-01), Reed et al.
patent: 3817503 (1974-06-01), Lafferty et al.
patent: 3901492 (1975-08-01), Lafferty
patent: 3988084 (1976-10-01), Esposito et al.
patent: 4021167 (1977-05-01), Niimi et al.
patent: 4080126 (1978-03-01), Clark et al.
patent: 4272463 (1981-06-01), Clark et al.
patent: 4374633 (1983-02-01), Hart
patent: 4382903 (1983-05-01), Larsson et al.
patent: 4385878 (1983-05-01), Larsson et al.
patent: 4386896 (1983-06-01), Ray
patent: 4416600 (1983-11-01), Lecznar et al.
patent: 4575325 (1986-03-01), Duerig et al.
patent: 4619597 (1986-10-01), Miller
patent: 4619845 (1986-10-01), Ayers et al.
patent: 4631013 (1986-12-01), Miller
patent: 4632170 (1986-12-01), Pohl
Backmark et al., Powder Metallurgy Intl., 18, 338, (1986).
Anderson et al., unpublished paper submitted 20 Sep. 84 to Metallurgical Transactions A.
Raman Ramaswamy V.
Surette Howard
Craig Frances P.
GTE Laboratories Incorporated
Stallard Wayland
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