Method for superconducting connection between MgB2 superconducting wires via a MgB2 matrix made from a boron powder compressed element infiltrated with Mg

US8709961B2 · kind B2 · utility

Assignee

• BRUKER EAS GMBH · DE

Inventors

• Felicitas Tenbrink · Alzenau, DE
• André Aubele · Hanau, DE
• Volker Gluecklich · Hammersbach, DE
• Bernd Sailer · Alzenau, DE
• Klaus Schlenga · Linkenheim-Hochstetten, DE

Key dates

• Filing date: Feb 18, 2010
• Grant date: Apr 29, 2014
• Expiry date: Aug 3, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49014
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for superconductingly connecting two or more wires (1, 2), each comprising at least one filament (3a-3d) that contains MgB2 or a mixture of Mg and B, wherein a superconducting connection is realized through exposed end regions (4a) of the filaments (3a-3d) via an MgB2 matrix, is characterized in that a bulk boron powder (4) is provided into which the exposed end regions (4a) of the filaments (3a-3d) of the wires (1, 2) project, the boron of the bulk boron powder (4) being present in amorphous modification. The bulk powder (4) is then compacted together with the projecting exposed end regions (4a) of the filaments (3a, 3b) to form a compressed element (8) and the compressed element (8) is infiltrated with molten magnesium (10) from the surface (13) of the compressed element (8). The method improves the quality, in particular, the current-carrying capacity and the critical magnetic field strength of a superconducting connection of MgB2 superconducting wires.