Title :
A comparison of buffer layer architectures on continuously processed YBCO coated conductors based on the IBAD YSZ process
Author :
Holesinger, Terry G. ; Foltyn, Stephen R. ; Arendt, Paul N. ; Jia, Quanxi ; Dowden, Paul C. ; DePaula, Raymond F. ; Groves, James R.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
The microstructures of continuously processed YBa2Cu 3Oy (YBCO) coated conductors processed with three different architectures are presented. YBCO films were deposited directly on ion-beam-assisted deposition (IBAD) yttria-stabilized zirconia (YSZ) or on intervening layers of Y2O3 or CeO2. Different interfacial reactions were observed in each case. The volume changes that occur with the interfacial reactions were calculated based on the identified reaction products. The calculated volume changes correlate with the observed microstructures and appear to be an important factor in determining an optimal buffer layer system. The interfacial reactions do not preclude the attainment of high Ic and Jc values in these coated conductors
Keywords :
barium compounds; crystal microstructure; high-temperature superconductors; ion beam assisted deposition; superconducting thin films; yttrium compounds; zirconium compounds; CeO2; HTSC; IBAD YSZ process; Y2O3; Y2O3ZrO2; YBa2Cu3O; YBa2Cu3Oy; buffer layer architectures; continuously processed YBaCuO coated conductors; interfacial reactions; ion-beam-assisted deposition; microstructures; reaction products; volume changes; yttria-stabilized zirconia; Buffer layers; Conducting materials; Conductors; Lattices; Microstructure; Optical pulses; Pulsed laser deposition; Substrates; Superconducting films; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
