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:
Apr. 06, 1982
Filed:
Mar. 31, 1981
Kyoji Tachikawa, Tokyo, JP;
Hisashi Sekine, Tokyo, JP;
National Research Institute for Metals, Tokyo, JP;
Abstract
In a method of producing a superconducting Nb.sub.3 Sn wire which comprises passing a wire or tape of a niobium-base alloy through a molten metal bath containing tin and then heat-treating it to form a Nb.sub.3 Sn compound layer on the surface of said wire or tape, the improvement wherein said niobium-base alloy is an alloy comprising niobium and 0.1 to 30 atomic percent of hafnium, and said molten metal bath is a molten bath of pure tin or a tin-base alloy consisting of tin, from 0.1 to 70 atomic percent of one element of Group IIIb of the periodic table selected from the group consisting of gallium, indium, and aluminum, and from 0.1 to 70 atomic percent of one element of Group Ib of the periodic table selected from the group consisting of copper and silver, the total amount of the element of Group IIIb and the element of Group Ib not exceeding 70 atomic percent.