Process for the preparing via the in situ reduction of their com

Details Process for the preparing via the in situ reduction of their com Process for the preparing via the in situ reduction of their com

1991-04-12

1992-09-08

Roy, Upendra

Specialized metallurgical processes, compositions for use therei

Compositions

Loose particulate mixture containing metal particles

75249, 419 12, 419 32, 428614, 428629, B23K 900, B22F 100

Patent

active

051455137

ABSTRACT:
A process for the preparation of composite materials consisting essentially of an oxide phase and a metal phase is effected by grinding a mixture of at least one oxide precursor of the metal phase of the composite with at least one reducing agent, the reducing agent being a precursor of the oxide phase. The grinding being performed in a high energy mechanical grinder for a sufficient length of time so that at least 80 percent of the oxide precursor is reduced to metal or to a metal alloy. The process is particularly valuable for the preparation of oxide/metal composite materials which have improved mechanical, electrical or radiation absorption properties.

REFERENCES:
patent: 3205099 (1965-09-01), Vordahl
patent: 3723092 (1973-03-01), Benjamin
patent: 4300947 (1981-11-01), Habesch, Jr. et al.
patent: 4649083 (1987-03-01), Fister et al.
patent: 4689077 (1987-08-01), Chevigne et al.
patent: 4689461 (1987-08-01), Gamberg
patent: 4749545 (1988-06-01), Begg et al.
patent: 4909840 (1990-03-01), Schlump
Fecht et al. Met. Trans. 21A (1990) 2333.

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