JPH05334920

• Main Authors: MIYATAKE TAKAYUKI, MIYAZAKI TAKAYOSHI, MATSUKURA ISAKAZU, SHIMADA MASAO, MIZOMATA YOUICHI
• Format: Patent
• Language: English
• Published: 17.12.1993
• Edition: 5
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CABLES; CHEMISTRY; CONDUCTORS; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; INSULATORS; METALLURGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PURPOSE:To reduce annealing times and shorten a manufacturing time so as to enhance profitability by selecting a Cu-Sn alloy layer covering Nb in such a manner as to satisfy a specific condition. CONSTITUTION:In an Nb3Sn superconductive wire, a Cu layer 1, a cylindrical Sn diffusion preventing barrier layer 2, a cylindrical layer 3 made of Cu or a Cu-Sn alloy, a rod-like annular disposing layer with a plurality of Nb rods embedded in the Cu-Sn alloy, and a Cu or Cu-Sn alloy layer 4 are approximately coaxially disposed in order from the center to the outer layer. The Cu-Sn alloy covering Nb is composed of (x) wt.% of Cu, (y) wt.% of Sn, and the remainder of M (wherein M represents Ti, Ta, Mn, and Nip. The Cu-Sn alloy of the inside or outside cylindrical layer is composed of (m) wt.% of Cu, (n) wt.% of Sn, and the remainder of M. (x), (y), (m), and (n) are selected in such a manner as to satisfy the condition expressed by Formula 1. Consequently, it is possible to reduce annealing times and shorten a manufacturing time, thus obtaining the Nb3Sn superconductive wire having improved profitability.