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:
Jun. 24, 2003
Filed:
Nov. 05, 2001
Mark Gilbert Benz, Lincoln, VT (US);
Theodore McCall Evenden, Pattersonville, NY (US);
Judson Sloan Marte, Wynantskill, NY (US);
Thomas Robert Raber, Schenectady, NY (US);
General Electric Company, Niskayuna, NY (US);
Abstract
A multi-filament superconducting wire in which the filaments comprise zirconia-stabilized ultra-fine grain Nb Sn. The superconducting wire is formed by wire-drawing a preform comprising a metallic matrix and at least one niobium alloy rod having zirconium and oxygen in solid solution and heat treating the drawn wire in the presence of tin to yield at least one continuous filament comprising ultra-fine grain Nb Sn having semi-coherent ZrO precipitates disposed therein. The ZrO precipitates serve to stabilize the ultra-fine grain microstructure of the Nb Sn at temperatures up to 1100° C. and allows Nb Sn to maintain the ultra-fine grain microstructure when heat treated at temperatures that are greater than those previously used. By using higher temperatures to form Nb Sn, the time required for heat treatment can be significantly reduced.