Textured tape substrates made of ternary alloys based on Cu-40%Ni-Me constantan for epitaxial deposition of buffer and superconducting layers

The structure was studied and the texture formation process was investigated in tapes made of Cu-Ni-Me ternary alloys (Me = Fe, Cr, V, or Mn) during cold deformation by rolling to a degree of similar to 99% with subsequent recrystallization annealing. It was shown that it is generally possible to create a perfect cubic texture in a thin ribbon made of ternary alloys based on copper and nickel to which a period 4 d-element (iron, chromium, or vanadium) was added. This makes these tapes promising as substrates in the technology for producing second-generation high-temperature superconductor tapes. The optimal annealing conditions were determined, under which, in the studied alloys, a perfect biaxial near-single-crystalline texture can be obtained with a content of cubic grains {001}aOE (c) 100 > +/- 10A degrees on the surface of the textured ribbon of above 99%.