Powder treatment process

Details Powder treatment process Powder treatment process

1985-04-25

1988-02-09

Lechert, Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

419 30, 419 31, 419 33, 419 37, 419 38, 419 49, 264 63, 264125, 75 05BA, 75 05BB, 75 05BC, B22F 100

Patent

active

047241217

ABSTRACT:
(1) A process comprising spray drying a powder-containing slurry, the slurry containing a powder constituent susceptible of oxidizing under the temperature conditions of the spray drying, while reducing the tendency for oxidation of the constituent by including as a liquid constituent of the slurry an organic liquid; (2) a process comprising spray drying a powder-containing slurry, the powder having been pretreated to reduce content of a powder constituent susceptible of oxidizing under the temperature conditions of the spray drying, the pretreating comprising heating the powder to react the constituent; and (3) a process comprising reacting ceramic powder, grinding the reacted powder, slurrying the ground powder, spray drying the slurried powder, and blending the dried powder with metal powder.

REFERENCES:
patent: 3907546 (1975-09-01), Port et al.
patent: 4028095 (1977-06-01), Laferty et al.
patent: 4070184 (1978-01-01), Scheithauer et al.
patent: 4109060 (1978-08-01), Andersson et al.
patent: 4397889 (1983-08-01), Benjamin et al.
patent: 4478888 (1984-10-01), Benjamin et al.
patent: 4592781 (1986-06-01), Cheney et al.
patent: 4613371 (1986-09-01), Cheney et al.

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