Hot-cathode material and production thereof

Details Hot-cathode material and production thereof Hot-cathode material and production thereof

1979-04-03

1981-06-23

Hunt, Brooks H.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428565, 428664, 313346R, B22F 500

Patent

active

042751233

ABSTRACT:
A hot-cathode material in wire or sheet form, comprising a high-melting carrier metal, an oxide activator and a carbide reducing agent, and, optionally, a diffusion-promoting additive, the material comprising a core zone and at least one surface layer having different compositions or different concentrations of constituents therein which are such that, in operation, the rate of diffusion of the activator from the core zone is equal to or greater than the loss of activator from the surface layer. The material is made by a powder metallurgy/thermo-mechanical process.

REFERENCES:
patent: 3911309 (1975-10-01), Kummel et al.
patent: 3921031 (1975-11-01), Dubois et al.
patent: 3976853 (1976-08-01), Tratner
patent: 4019081 (1977-04-01), Buxbaum et al.
patent: 4083811 (1978-04-01), Bachmann et al.

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