Base metal plate materials for directly heated oxide cathode

Details Base metal plate materials for directly heated oxide cathode Base metal plate materials for directly heated oxide cathode

1977-08-11

1979-03-27

Dean, R.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

148 32, C22C 1903

Patent

active

041463935

ABSTRACT:
Base metal plate materials for a directly heated oxide cathode consisting mainly of nickel and containing 10-22% by weight of molybdenum, 1-8% by weight of tungsten and a small amount of at least one reducing agent such as zirconium can make the oxide layer of the cathode more difficult to be peeled off and are almost similar in mechanical strengths at high temperatures, specific electric resistance and the diffusion velocity of zirconium as compared with prior art materials consisting mainly of nickel and containing 20-30% by weight of tungsten and 0.3-5% by weight of zirconium, and can further permit maintenance of the electron emissive ability of the oxide cathode.

REFERENCES:
patent: 2921850 (1960-01-01), Inouye et al.

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