Airco, Inc.

Morris S Young

David C Larbalestier

William G Marancik

A multifilamentary stabilized superconductor of the A-15 type is disclosed wherein the A-15 compound is formed on rods of niobium or vanadium by diffusion of tin or gallium, respectively, from a copper alloy matrix and wherein stabilization is provided by an external layer of copper. The stabilizing copper is protected from tin or gallium diffusion by a number of spirally wrapped layers of tantalum separated from one another by copper layers.

Wrapped tantalum diffusion barrier

A multifilamentary superconductor having a large number of NbTi filaments in an aluminum alloy matrix which is stabilized by a high-purity aluminum sheath is disclosed, together with the method of its manufacture. An Al alloy billet having a number of NbTi rods disposed therein is extruded. A superpure Al sheath is added; this product is then enclosed in copper and wiredrawn after which the copper is etched off.

Aluminum-stabilized multifilamentary superconductor

A method of making A-15 type intermetallic superconductors is disclosed which features elimination of numerous annealing steps. Nb or V filaments are embedded in Cu matrices; annular layers of Sn or Ga, respectively, separated from each other by Cu layers, provide the other component of the intermetallic superconductors Nb.sub.3 Sn and V.sub.3 Ga.

Method of production multifilamentary intermetallic superconductors

A multifilamentary superconductor having a large number fo NbTi filaments in an aluminum alloy matrix which is stabilized by a high-purity aluminum sheath is disclosed, together with the method of its manufacture. An Al alloy billet having a number of NbTi rods disposed therein is extruded. A superpure Al sheath is added; this product is then enclosed in copper and wiredrawn after which the copper is etched off.

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Murray Hill, NJ, United States of America

Morris S Young