Method for preparing superconductive Nb.sub.3 Sn layers on niobi

Details Method for preparing superconductive Nb.sub.3 Sn layers on niobi Method for preparing superconductive Nb.sub.3 Sn layers on niobi

1976-07-15

1978-03-28

Kendall, Ralph S.

Coating processes

Electrical product produced

Superconductor

29599, 118 48, 118 49, 228263, 331 96, 331107S, 427250, 427295, 427124, C23C 1302

Patent

active

040815730

ABSTRACT:
A method for preparing superconductive Nb.sub.3 Sn layers on niobium surfaces for high frequency applications in which a defined reaction zone which contains a tin source and the niobium surface is formed in an open reaction chamber and sealed off to the extent that, while interfering gases are being drawn off from the reaction zone during the evacuation, the vapor pressure of the tin remains higher within the reaction zone, when heated, than in the rest of the chamber. While pumping continuously, the reaction zone is then heated to a temperature between 930.degree. and 1400.degree. C and held at this temperature until an Nb.sub.3 Sn layer 0.5 to 5 .mu.m thick is formed on the niobium surface.

REFERENCES:
patent: 3085913 (1963-04-01), Caswell
patent: 3213825 (1965-10-01), Cooper et al.
patent: 3332800 (1967-07-01), Saur
patent: 3346467 (1967-10-01), Allen
patent: 3468021 (1969-09-01), Maier
patent: 3493809 (1970-02-01), Weissman
patent: 3533919 (1970-10-01), Prior
patent: 3576670 (1971-04-01), Hammond
patent: 3661639 (1972-05-01), Caslaw
Hillenbrand et al., "Superconducting Nb.sub.3 Sn-Cavities," IEEE Transactions on Magnetics, vol. MAG-II, No. 2, Mar. 1975.

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