US 11,887,751 B2
Textured-powder Bi-2212/Ag wire and method of fabrication
Peter McIntyre, Bryan, TX (US); and John Scott Rogers, College Station, TX (US)
Assigned to The Texas A&M University System, College Station, TX (US); and Accelerator Technology Corp., College Station, TX (US)
Filed by The Texas A&M University System, College Station, TX (US); and Accelerator Technology Corp., College Station, TX (US)
Filed on Oct. 24, 2021, as Appl. No. 17/509,029.
Claims priority of provisional application 63/198,522, filed on Oct. 24, 2020.
Prior Publication US 2022/0130576 A1, Apr. 28, 2022
Int. Cl. H01B 12/06 (2006.01); H01B 13/00 (2006.01)
CPC H01B 12/06 (2013.01) [H01B 13/0036 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A billet for forming a textured-powder Bi-2212 wire, the billet comprising:
a billet core subassembly comprising a plurality of triangular-cross-section silver-clad TP bars, assembled in a contiguous axisymmetric array, inserted within an alloy-silver sheath tube and drawn to compact the triangular bars and the sheath tube;
a first plurality of silver-clad tetrahedral sections surrounding the billet core subassembly; and
powdered Bi-2212 disposed in each tetrahedral section, wherein each tetrahedral section of the first plurality of tetrahedral sections comprises a silver-clad TP bar that is wrapped in an alloy-silver wrap and further compacted to bond the wrap to the silver-clad TP bar.
 
7. A cable-in-conduit conductor comprising:
a perforated inner tube;
a plurality of superconducting Bi-2212/Ag wires surrounding the perforated inner tube in two layers;
an outer sheath surrounding the plurality of superconducting wires,
wherein each superconducting wire of the plurality of super conducting wires comprises a plurality of tetrahedral sections surrounding a billet core subassembly.
 
10. A method of fabricating a billet, the method comprising:
surrounding a billet core subassembly with a first plurality of tetrahedral silver-wrapped TP bars;
inserting the billet core subassembly and the first plurality of tetrahedral silver-wrapped TP bars into a first alloy-silver sheath tube; and
drawing the first sheath tube down to lock a registration of the first plurality of tetrahedral silver-wrapped TP bars.