Superconducting wire, superconducting mutifilamentary wire using the superconducting wire, and method of manufacturing the same
AssigneeSumitomo Electric Industries, Ltd.
InventorsMunetsugu UEYAMA, Jun FUJIKAMI
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Abstract
There is provided a superconducting wire that has a high critical current density and is less likely to suffer longitudinal cracking and breakage during the steps of manufacturing the same. The superconducting wire according to the present invention is an oxide superconducting wire including an oxide superconductor and a cladding metal for cladding the oxide superconductor, and is characterized in that a material of the cladding metal has a breaking strain of at least 30% in a stress-strain test.
Claims14
A superconducting wire, comprising an oxide superconductor and a cladding metal for cladding said oxide superconductor, a material of said cladding metal having a a breaking strain of at least 30% in a stress-strain test.
A method of manufacturing a superconducting wire, comprising the steps of:
- filling a metal cylinder made of a material of a cladding metal having a breaking strain falling within a range of 30% to 58% in a stress-strain test, with a raw powder containing a raw material of an oxide superconductor;
- and
- subjecting said metal cylinder filled with said raw powder to plastic working at least once and heat treatment at least once.
A method of manufacturing a superconducting multifilamentary wire, comprising the steps of:
- filling a metal cylinder made of a material of a cladding metal having a breaking strain falling within a range of 30% to 58% in a stress-strain test, with a raw powder containing a raw material of an oxide superconductor;
- subjecting said metal cylinder filled with said raw powder to plastic working at least once to obtain a wire;
- filling a metal cylinder to serve as a material of a second cladding metal, with a plurality of said wires;
- and
- subjecting said metal cylinder filled with said plurality of said wires to plastic working at least once and heat treatment at least once to obtain a superconducting multifilamentary wire.
Dependencies are inferred from the claim text.