Method of making a long life high current density cathode from t

Details Method of making a long life high current density cathode from t Method of making a long life high current density cathode from t

1989-11-20

1990-03-27

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Post sintering operation

419 28, 419 29, 419 33, 419 39, 419 54, 419 55, 419 58, B22F 326

Patent

active

049116266

ABSTRACT:
A long life high current density cathode is made from a mixture of tungsten nd iridium powders by processing the mixture of powders with an activator into a porus billet, and then impregnating the billet with a mixture of barium peroxide and a coated emitter by firing the billet in a dry hydrogen furnace at a temperature at which the impregnant melts.

REFERENCES:
patent: 4818480 (1989-04-01), Branovich et al.
patent: 4890767 (1989-06-01), Branovich et al.

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