Coating processes – Electrical product produced – Superconductor
Patent
1974-10-31
1977-04-19
Lovell, C.
Coating processes
Electrical product produced
Superconductor
29599, 118405, 148 63, 148 203, 148133, 427380, 427383D, 427436, B05D 512, C21D 100, C22F 118
Patent
active
040189422
ABSTRACT:
The invention concerns a method for the manufacture of a superconductor with a layer of the A-15 phase of the system Nb--Al or Nb--Al--Ge. According to the invention, a niobium carrier is provided with a 0.5 to 5 .mu.m thick layer consisting of NbAl.sub.3 and Al or of Nb(Al,Ge).sub.3, respectively, by being placed in an aluminum melt which is saturated with niobium or niobium and germanium, respectively, and is heated to 800.degree. to 1400.degree. C, and the niobium carrier provided with this layer is then annealed in an inert atmosphere for 0.5 to 5 seconds at a temperature of 1700.degree. to 1960.degree. C.
REFERENCES:
patent: 2216519 (1940-10-01), Quarnstrom
patent: 3346467 (1967-10-01), Allen
patent: 3694274 (1972-09-01), Giorgi et al.
patent: 3765930 (1973-10-01), Miyano
Journal Appl. Physics, vol. 43, 1972, pp. 2407-2412.
Metallurgical Transactions, vol. 3, May 1972, pp. 1177-1181.
Zeitschrift Fur Naturforschung, 25a, 1970, pp. 1659-1669.
Constitution of Binary Alloys, Second Supplement Shunk, 1969, pp. 18-20.
Fink Arno
Muller Alfred
Lovell C.
Siemens Aktiengesellschaft
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