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:
Jul. 03, 2001
Filed:
Apr. 23, 1998
Fumikazu Hosono, Ibaraki, JP;
Noriyuki Tatsumi, Ibaraki, JP;
Kenichi Kikuchi, Ibaraki, JP;
Genzo Iwaki, Ibaraki, JP;
Hidezumi Moriai, Ibaraki, JP;
Hitoshi Yasuda, Ibaraki, JP;
Akihiko Takahashi, Ibaraki, JP;
Other;
Abstract
A tube made of oxygen free copper is filled with a plurality of copper matrix Nb—Ti superconducting lead wires to obtain a composite billet. The resulting billet is subjected to hydrostatic pressure extrusion. Further, ageing heat treatment and wire drawing process are repeated for the composite material three times to prepare a Cu/Nb—Ti superconducting single wire. Then, the resulting Cu/Nb—Ti superconducting single wires are stranded each other to produce a superconducting strand. The superconducting strand is coated with an aluminum alloy to which either a content of 20 to 100 ppm of Cu and Mg or Mg, or a content of 10 to 120 ppm of Si and Cu is added by means of hot extrusion, the strand thus extruded is reduced by 0 to 20% in accordance with cold working to produce an aluminum stabilized superconductor. As a result, such aluminum stabilized superconductor having high mechanical strength as well as good thermal and electrical stability is provided while achieving light weight and downsizing thereof.