A Phase Relation Study of Ba-Y-Cu-O Coated-Conductor Films Using the Combinatorial Approach
- National Institute of Standards and Technology (NIST)
- ORNL
- American Superconductor Corporation, Westborough, MA
Phase relationships in bulk and thin film Ba-Y-Cu-O high-Tc superconductor system were determined at processing conditions relevant for industrial production of coated conductors. Our results demonstrated that the absence of BaY2CuO5 (which has a critical effect on flux pinning) at 735 C--a typical temperature employed in production of coated conductors--in thin films processed in situ from the BaF2 precursor is caused by the sluggish reaction kinetics rather than by the presence of fluorine in the system. Thermodynamic calculations combined with annealing experiments confirmed that BaY2CuO5 is thermodynamically stable but forms at temperatures higher than 735 C.
- Research Organization:
- Oak Ridge National Laboratory (ORNL)
- Sponsoring Organization:
- OE USDOE - Office of Electric Transmission and Distribution
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 959451
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 17 Vol. 94; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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