Method for the manufacture of a superconductor with a layer of the A-15 phase of the system Nb-Al or Nb-Al-Ge

US4018942A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Alfred Muller · Krefeld, DE
• Arno Fink

Key dates

• Filing date: Oct 31, 1974
• Grant date: Apr 19, 1977
• Expiry date: Oct 31, 1994

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49014

Abstract

The invention concerns a method for the manufacture of a superconductor with a layer of the A-15 phase of the system Nb--Al or Nb--Al--Ge. According to the invention, a niobium carrier is provided with a 0.5 to 5 .mu.m thick layer consisting of NbAl.sub.3 and Al or of Nb(Al,Ge).sub.3, respectively, by being placed in an aluminum melt which is saturated with niobium or niobium and germanium, respectively, and is heated to 800.degree. to 1400.degree. C, and the niobium carrier provided with this layer is then annealed in an inert atmosphere for 0.5 to 5 seconds at a temperature of 1700.degree. to 1960.degree. C.