The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 1987
Filed:
Sep. 08, 1986
Rene Flukiger, Karlsruhe, DE;
Stephen Gauss, Stuttgart, DE;
Kernforschungszentrum Karlsruhe GmbH, Karlsruhe, DE;
Abstract
The present invention relates to a method for producing multifilament superconductive wires of Nb.sub.3 Sn or V.sub.3 Ga filaments embedded in a Cu or Cu alloy matrix, with the wires containing metal additive elements from the group including Ti, Zr, Hf, V, Nb, Ta, Fe, Co, Ni in the filaments and/or in the matrix. The superconductive characteristics of the wires are predetermined for medium magnetic fields (below 12 T) as well as for high magnetic fields (12 T and above). The percentage of the additive (or additives) can be set to a predetermined value and thus the superconductive properties can be set as desired. This is accomplished by mixing metal additives in powder form with a powder of niobium or a niobium alloy, or of vanadium or a vanadium alloy, in a defined grain size and in a defined quantity. The resulting powder mixture is compacted in a container of copper or a copper alloy, the compacted container is shaped into a wire and, upon removal of the container layer, is processed further into wires. Depending on the desired superconductive properties, the final reaction heat treatment of the wires is performed at a selected temperature in a range from 500.degree. C. to 1000.degree. C. and at a selected heat treatment duration in a range from 48 to 300 hours.