Method for manufacturing impregnated cathodes

Details Method for manufacturing impregnated cathodes Method for manufacturing impregnated cathodes

1991-12-27

1992-07-21

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

419 2, 419 19, 419 27, 264 60, 2642711, B22F 700

Patent

active

051320819

ABSTRACT:
A method for manufacturing an impregnated cathode comprising the steps of forming a porous pallet having a plurality of pores by sintering metal powder at a high temperature in a reducing atmosphere and fitting the porous pallet tightly in a cathode ring made of a metal containing an oxidizable material such as silicon, nickel or chromium. In the porous pallet, an electron radiating material is impregnated which is able to react with the oxidizable material of the cathode ring, so that an fixing between the pallet and the cathode ring is achieved by the reaction between the electron radiating material and the oxidizable material. In accordance with the method, the thickness of the cathode body can be greatly reduced, thereby enabling the performance of the impregnated cathode to be improved. Also, the manufacturing process can be simplified, thereby improving the productivity.

REFERENCES:
patent: 3638062 (1972-01-01), Beggs et al.
patent: 4223243 (1980-09-01), Oliver et al.

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