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AssigneeThe United States of America as represented by the United States Energy Research and Development Administration
InventorsBruce P. Strauss, Paul J. Reardon, Robert H. Remsbottom
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An improvement in the method for preparing composite rods of superconducting alloy and normal metal from which multifilament composite superconducting wire is fabricated by bending longitudinally a strip of normal metal around a rod of superconductor alloy and welding the edges to form the composite rod. After the rods have preferably been provided with a hexagonal cross-sectional shape, a plurality of the rods are stacked into a normal metal extrusion can, sealed and worked to reduce the cross-sectional size and form multifilament wire. Diffusion barriers and high-electrical resistance barriers can easily be introduced into the wire by plating or otherwise coating the faces of the normal metal strip with appropriate materials.
In the method for preparing multifilament composite electrical conductors in which a rod of ductile superconducting alloy is provided with an annular sheath of ductile normal metal to form a composite rod, a plurality of composite rods having a hexagonal cross-sectional shape are stacked in parallel into an extrusion can of ductile normal metal to form an assembly, and the assembly is worked to elongate and reduce the cross section of the assembly to a predetermined cross-sectional size, thereby forming a multifilament composite electrical wire, the improvement in the method for preparing the composite rod comprising:
Dependencies are inferred from the claim text.