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US 4,906,609 AGranted
Fabrication of superconducting oxide wires by powder-in-tube method
AssigneeSumitomo Electric
InventorsKazuhisa Yamauchi, Kazuya Ohmatsu, Tetsuya Ishida, Tomoji Gotoh, Syuji Yazu, Tetsuji Jodai
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Abstract
A powder-in-tube method of producing an oxide superconduction wire is disclosed in which a preformed copper oxide superconducting powder is continuously filled into a tube precursor having a U shape cross-section formed from a long strip of metal material. The tube precursor is formed into a tube by bending and welding. The resulting tube is drawn to a reduced cross-section and further heated to sinter the packed powder to form the finished oxide superconducting wire.
Claims20
A method of producing a superconducting wire, comprising the steps of:
- continuously forming a long strip of material into a tube precursor having a U-shaped section;
- continuously filling the interior of the resulting tube precursor with powder of a copper oxide superconductive ceramic material;
- forming the tube precursor of U-shaped section into a tube having an O-shaped section and welding together opposed butted edge portions of said strip material, to form a tube;
- drawing the resulting tube having the powder enclosed therein to a reduced cross-section;
- and
- heating the resulting assembly to sinter said powders.
3 more elements
Dependencies are inferred from the claim text.