Base metal plate for directly heated oxide cathode

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

1976-07-30

1978-03-14

Hunt, Brooks H.

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75170, 75246, 313345, 313353, B22F 300

Patent

active

040791645

ABSTRACT:
A base metal plate for directly heated oxide cathode comprising a plate of Ni-W-Zr alloy containing 20 to 30% by weight of W and 0.3 to 5.0% by weight of Zr, which can further contain a small amount of other reducing element such as Mg, Al, or Si, and having a thickness of not more than 50.mu.. The base metal plate is prepared by powder metallurgy, and has a good life time of electron emission and a good strength in the operating temperature range of cathode.

REFERENCES:
patent: 2162596 (1939-06-01), Wyman
patent: 2720458 (1955-10-01), Kates
patent: 2833647 (1958-05-01), Hoff et al.
patent: 3674710 (1972-07-01), Richter et al.
patent: 3745403 (1973-07-01), Misumi
patent: 3902093 (1975-08-01), Weiss

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