Metal treatment – Compositions – Heat treating
Patent
1976-09-09
1978-02-14
Stallard, W.
Metal treatment
Compositions
Heat treating
29599, 148 115R, H01L 3900, H01L 3924
Patent
active
040736660
ABSTRACT:
A method and article produced thereby are disclosed wherein the method produces a multi-filament superconductor having an insulation capable of withstanding extended heat treatment. According to the invention, a plurality of superconductor forming rods and a plurality of rods of normally conductive material are packed into a can made of a ductile material such as copper and having its interior lined with a valve metal such as tantalum. This assembly is extruded and drawn to a desired size as is known in the art. The ductile metal exterior layer is then removed to expose the valve metal. The exposed valve metal is thereafter oxidized to form an insulating oxide.
REFERENCES:
patent: 3205461 (1965-09-01), Anderson
patent: 3429032 (1969-02-01), Martin et al.
patent: 3593413 (1971-07-01), Kafka
patent: 3618205 (1971-11-01), Barber et al.
patent: 3649356 (1972-03-01), Mullen et al.
patent: 3676576 (1972-07-01), Dubernet et al.
Marancik William G.
Ormand Frederick T.
Airco, Inc.
Angeli Michael de
Bopp Edmund W.
Cassett Larry R.
Stallard W.
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