Cube textured nickel alloy tapes as substrates for YBa2Cu3O7−δ-coated conductors

✍ Scribed by B de Boer; J Eickemeyer; N Reger; L Fernandez G.-R; J Richter; B Holzapfel; L Schultz; W Prusseit; P Berberich

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 973 KB
• Volume: 49
• Category: Article
• ISSN: 1359-6454
• DOI: 10.1016/s1359-6454(01)00041-6

✦ Synopsis

Suitable substrates for biaxially textured high temperature superconducting YBa 2 Cu 3 O 7Ϫδ -thin films, which are necessary to carry high currents, are highly cube ({001}͗100͘) textured Ni-tapes that can be produced by heavy cold rolling and succeeding recrystallization annealing. At high temperatures which are necessary for the deposition of the YBa 2 Cu 3 O 7Ϫδ -film such tapes often tend to abnormal grain growth destroying the cube texture. It was found that this can be avoided by microalloying Ni with 0.1 at.% of different elements each leading to a texture improvement with increasing annealing temperature. YBa 2- Cu 3 O 7Ϫδ -films deposited on these microalloyed tapes reach critical current densities up to 0.5×10 6 A/cm 2 . Also non-magnetic Ni-alloys, namely Ni-13 at.%Cr and Ni-9 at.%V, were successfully processed to highly cube textured tapes. Tapes made of these alloys are not only an improvement because magnetic losses are avoided but also because of a three times enhanced yield strength which is due to solid solution hardening.