Abstract
In this study, processing of Tb2O3 buffer layers on textured Ni tapes were evaluated for YBa2Cu3O7-x (YBCO) coated conductor. A solution deposition process was used to grow textured Tb2O3 buffer layers on the Ni tapes. The solution was prepared using Tb-2, 4-pentanedionate precursor, methanol as solvent, chelating agents and a solution modifying chemical, triethanolamine (TEA). Biaxially textured Ni substrates were dipped into the solution by a reel-to-reel sol-gel dip coating system. The amorphous thin films were dried at 300°C for 30 sec and then heat-treated at 500°C for 2 min in air using an in-line three-zone furnace. The films were annealed at temperature range of 900°C and 1170°C for 10 to 20 min under 4%H2-Ar gas flow. The textured buffer layers were obtained using TEA onto the textured Ni tapes at 1150°C for 10 minutes. The Tb2O3 (222) pole figure revealed a single cube-on-cube texture. The omega and phi scans indicated good out-of-plane and in-plane orientations. DTA results pointed out that Tb based gel film transformed to oxide structure at temperature range of 350°C and 410°C. Microstructures of the Tb2O3 films were investigated by Environmental Scanning Electron Microscope (ESEM), and the films were dense, smooth and free from cracks and pinholes.
Original language | English |
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Pages (from-to) | 2669-2672 |
Number of pages | 4 |
Journal | IEEE Transactions on Applied Superconductivity |
Volume | 13 |
Issue number | 2 III |
DOIs | |
Publication status | Published - Jun 2003 |
Externally published | Yes |
Event | 2002 Applied Superconductivity Conference - Houston, TX, United States Duration: 4 Aug 2002 → 9 Aug 2002 |
Keywords
- Buffer layers and YBCO
- Sol-gel
- TbO