A method, system, and apparatus for fabricating a high-strength Superconducting cable comprises pre-oxidizing at least one high-strength alloy wire, coating at least one Superconducting wire with a protective layer, and winding the high-strength alloy wire and the Superconducting wire to form a high-strength Superconducting cable.

Methods and devices involving 2212 multifilament superconducting wire with resistance sleeves. More specifically, methods and devices including high resistance sleeves around individual, unmerged filaments or filament bundles, with axial twist, and with round or rectangular wire shape for lower losses in and ramped fields.

Methods and devices involving 2212 multifilament superconducting wire with resistance sleeves. More specifically, methods and devices including high resistance sleeves around individual, unmerged filaments or filament bundles, with axial twist, and with round or rectangular wire shape for lower losses in and ramped fields.

Disclosed herein are superconducting wires. The superconducting wires can comprise a metallic matrix and at least one continuous subelement embedded in the matrix. Each subelement can comprise a non-superconducting core, a superconducting layer coaxially disposed around the non-superconducting core, and a barrier layer coaxially disposed around the super-conducting layer. The superconducting layer can comprise a plurality of Nb.sub.3Sn grains stabilized by metal oxide particulates disposed therein. The Nb.sub.3Sn grains can have an average grain size of from 5 nm to 90 nm (for example, from 15 nm to 30 nm). The superconducting wire can have a high-field critical current density (J.sub.c) of at least 5,000 A/mm.sup.2 at a temperature of 4.2 K in a magnetic field of 12 T. Also described are superconducting 4 wire precursors that can be heat treated to prepare super-conducting wires, as well as methods of making super-conducting wires.

Disclosed herein are superconducting wires. The superconducting wires can comprise a metallic matrix and at least one continuous subelement embedded in the matrix. Each subelement can comprise a non-superconducting core, a superconducting layer coaxially disposed around the non-superconducting core, and a barrier layer coaxially disposed around the super-conducting layer. The superconducting layer can comprise a plurality of Nb.sub.3Sn grains stabilized by metal oxide particulates disposed therein. The Nb.sub.3Sn grains can have an average grain size of from 5 nm to 90 nm (for example, from 15 nm to 30 nm). The superconducting wire can have a high-field critical current density (J.sub.c) of at least 5,000 A/mm.sup.2 at a temperature of 4.2 K in a magnetic field of 12 T. Also described are superconducting 4 wire precursors that can be heat treated to prepare super-conducting wires, as well as methods of making super-conducting wires.

A compound superconducting twisted wire includes compound superconducting strands being twisted to form a twisted structure, in which each of the compound superconducting strands includes a compound superconductor part, a reinforcing part and a stabilizing part. The compound superconductor part includes compound superconducting filaments and a first matrix, the compound superconducting filaments each including a compound superconducting phase. The reinforcing part is disposed on an outer circumferential side of the compound superconductor part and includes reinforcing filaments and a second matrix. The stabilizing part is disposed on at least one side of an inner circumferential side and an outer circumferential side of the reinforcing part. A volume ratio of the reinforcing part relative to the compound superconducting strand is larger than a volume ratio of the compound superconductor part relative to the compound superconducting strand.

A compound superconducting twisted wire includes compound superconducting strands being twisted to form a twisted structure, in which each of the compound superconducting strands includes a compound superconductor part, a reinforcing part and a stabilizing part. The compound superconductor part includes compound superconducting filaments and a first matrix, the compound superconducting filaments each including a compound superconducting phase. The reinforcing part is disposed on an outer circumferential side of the compound superconductor part and includes reinforcing filaments and a second matrix. The stabilizing part is disposed on at least one side of an inner circumferential side and an outer circumferential side of the reinforcing part. A volume ratio of the reinforcing part relative to the compound superconducting strand is larger than a volume ratio of the compound superconductor part relative to the compound superconducting strand.

A method comprises disposing one or more continuous fibers, wherein the one or more continuous fibers are at least partially embedded in high temperature superconducting component powders. The fiber of the one or more continuous fibers comprises a curved fiber that comprises a hoop or a spiral. The method further comprises heating the high temperature superconducting component powders and the one or more continuous fibers and cooling the high temperature superconducting component powders and the one or more continuous fibers. The cooling generates a high temperature superconducting material.

A method comprises disposing one or more continuous fibers, wherein the one or more continuous fibers are at least partially embedded in high temperature superconducting component powders. The fiber of the one or more continuous fibers comprises a curved fiber that comprises a hoop or a spiral. The method further comprises heating the high temperature superconducting component powders and the one or more continuous fibers and cooling the high temperature superconducting component powders and the one or more continuous fibers. The cooling generates a high temperature superconducting material.

This compound superconducting precursor wire includes: a compound superconducting precursor portion including a plurality of compound superconducting precursor filaments, and a first matrix precursor having the plurality of compound superconducting precursor filaments embedded therein and including a first stabilizing material; a reinforcing material portion disposed on an outer peripheral side of the compound superconducting precursor portion; and a stabilizing material portion which is disposed on at least one of an inner peripheral side and an outer peripheral side of the reinforcing material portion, and consisting of a second stabilizing material, in which a Vickers hardness (HV) of the stabilizing material portion is 90 or less, and a 0.2% tensile strength of the compound superconducting precursor wire is 200 MPa or more.