Superconducting joint for superconducting wires and coils and method of forming
AssigneeGeneral Electric Company
InventorRoy F. Thornton
Life of this patent
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Abstract
The ends of a plurality of copper conductors bearing superconductive strands, for example of niobium-titanium, are treated with a liquid metal solvent to selectively remove the copper from the superconductive strands. The liberated strands of superconductor are then soldered with a superconducting solder. The joint is included in a coil which at superconducting temperatures induces a high magnetic field of 0.5 Tesla and above.
Claims21
A superconducting wire end adapted for being joined to other superconducting wire ends,
- said wire end having a plurality of superconducting filaments embedded in a matrix metal in one portion of said wire end,
- said filaments being liberated from and extending from said matrix in another portion of said wire end and being embedded in a superconducting solder metal.
A superconducting joint comprising a plurality of superconducting filaments of niobium-titanium conductor, each filament extending from one of two matrix metal wire ends,
- said filaments of each matrix metal wire end extending into and embedded in a solder joint of superconducting solder metal.
A superconducting coil,
- said coil comprising at least one winding of a plurality of fine superconductor filaments,
- said superconductor filaments being disposed in a metal matrix over most of their length,
- the ends of said superconductor filaments being liberated from and being free of said matrix metal,
- said liberated ends being held together to form a filament-to-filament joint and being at least partially immersed in a body of solidified lead-bismuth alloy.
A superconducting coil comprising a coil of at least one turn of superconducting wire,
- said wire having multiple fine filaments of superconductor extending lengthwire through an elongated matrix metal,
- said coil having at least one wire to wire joint,
- said joint containing filaments of said superconductor released from said matrix metal,
- the released superconductor filaments of each wire being embedded in the same solidified body of superconducting solder metal.
A superconducting joint comprising first and second sets of fine filaments of niobium-titanium alloy, filaments of said first set being held in contiguous relation with filaments of said second set to provide a superconducting path therebetween, filaments of said sets being surface coated with at least a zero amount to at most a minor amount of tin and being frozen in a common body of lead-bismuth.
Dependencies are inferred from the claim text.