CONSTRUCTION OF SUPERCONDUCTING MULTI-CORE BILLET AND METHOD FOR MANUFACTURING SUPERCONDUCTING MULTI-CORE WIRES
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United States of America Patent
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Issued Date -
Jul 26, 2012
app pub date -
Jan 19, 2012
filing date -
Jan 20, 2011
priority date (Note) -
Abandoned
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Abstract
A physical construction of a superconducting multi-core billet is provided together with a method for manufacturing a superconducting multi-core wire to offer reduction of manufacturing time (cost) and low frequency of occurrence of wire break during diameter-reduction drawing. The superconducting multi-core billet by the present invention has such a construction that a plurality of vertical holes are made in a billet 2 of copper or copper alloy of circular cross-section; that the vertical holes are filled with a superconducting material 4 comprised of NbTi; that a copper-volume ratio, which is a ratio of the copper or the copper alloy to NbTi in volume, is not smaller than four; that the plurality of vertical holes are made in the billet so that each of the vertical holes will be arrayed at an equal spacing on each of two inner and outer layers concentric circles.
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