Metal treatment – Compositions – Heat treating
Patent
1977-01-21
1978-05-09
Vertiz, O. R.
Metal treatment
Compositions
Heat treating
148 115A, 148133, 29599, H01L 3900
Patent
active
040885127
ABSTRACT:
A flexible Nb.sub.3 Al superconducting wire is fabricated from a niobium-aluminum composite wire by heating to form a solid solution which is retained at room temperature as a metastable solid solution by quenching. The metastable solid solution is then transformed to the stable superconducting A-15 phase by low temperature aging. The transformation induced by aging can be controlled to yield either a multifilamentary or a solid A-15 core surrounded by ductile niobium.
REFERENCES:
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patent: 3243871 (1966-04-01), Saur
patent: 3728165 (1973-04-01), Howlett
patent: 3801378 (1974-04-01), Webb
patent: 4000014 (1976-12-01), Winter
"1976 Applied Superconductivity Conference, 17-20 Aug. 1976, Stanford University, Stanford, California" E.R.D.A. Brochure pp. 80-83.
Lundin et al. "The Equilibrium Phase Diagram, Niobium-Aluminum" Trans. Met. Soc. AIME, vol. 236, Jun. 1966, pp. 863-872.
Ciardella et al. "A Quench-Age Method for the Fabrication of Nb(Al) Superconductors" IEEE Trans. on Magnetics vol. MAG-13, No. 1, 1/77, pp. 832-833.
IEEE Transactions on Magnetics, vol. MAG 13, No. 1, Jan. 1977, pp. 9, 10.
Eagar et al. "Improved Jc in Mechanically Fabricated Nb.sub.3 Al Wires and Ribbons"IEEE MAG-11(2), 214 (1975).
Ceresara et al. "Nb.sub.3 Al Formation at Temperatures Lower than 1000.degree. C IEEE MAG-11(2), 263 (1975).
Ciardella Robert L.
Pickus Milton R.
Carlson Dean E.
Croft Irene S.
Gaither Roger S.
Hearn Brian E.
The United States of America as represented by the United States
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