Process for producing composite agglomerates of molybdenum and m

Details Process for producing composite agglomerates of molybdenum and m Process for producing composite agglomerates of molybdenum and m

1987-06-04

1987-12-29

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

75 05AC, 75 05BC, 75240, 75251, 419 23, 419 31, 419 32, 419 33, 419 36, 419 58, B22F 100

Patent

active

047160195

ABSTRACT:
A process is disclosed for producing composite agglomerates of molybdenum and molybdenum carbide (Mo.sub.2 C). The process involves forming a relatively uniform mixture of non-agglomerated molybdenum powder and carbon powder having a particle size of no greater than the particle size of the molybdenum powder. The amount of carbon powder is proportional to the amount of molybdenum carbide desired in the composite agglomerate. A slurry is formed of the mixture, an organic binder, and water with the amount of the binder being no greater than about 2% by weight of the mixture; and the powders are agglomerated from the slurry. The agglomerated powders are then classified to remove the major portion of the agglomerates having a size greater than about 170 mesh and less than about 325 mesh from the balance of the agglomerates. The balance of the agglomerates in which the particle size is -170 +325 mesh is then reacted at a temperature of no greater than about 1400.degree. C. for a sufficient time in a non-carbonaceous vessel in a reducing atmosphere to form the composite agglomerates.

REFERENCES:
patent: 2050266 (1936-03-01), Boyer
patent: 2091017 (1937-08-01), Schwarzkopf
patent: 3840367 (1974-10-01), Rudy
patent: 4049380 (1977-09-01), Yih et al.
patent: 4397889 (1983-08-01), Benjamin et al.
patent: 4478888 (1984-10-01), Benjamin et al.
patent: 4491559 (1985-01-01), Grab et al.

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