Microstructural Development in YBA2CU3O7 Coated Conductors Based on Ex Situ YBCO Conversion Processes
Conference
·
OSTI ID:1003282
- Los Alamos National Laboratory (LANL)
- ORNL
- University of Wisconsin, Madison
- American Superconductor Corporation, Westborough, MA
Ex-situ conversion of YBA{sub 2}CU{sub 3}O{sub 7} precursors is an economically attractive process for adding the superconducting layer to a coated conductor substrate. Understanding the phase conversion process and final microstructural assemblage is crucial to maximizing the superconducting properties. Each process used to build a YBA{sub 2}CU{sub 3}O{sub 7} (Y-123) coated conductor creates an interface along which defects or interfacial reactions may result. These defects can be additive and propagate through the entire film structure to affect the growth and properties of the superconducting film. The effects of substrate features, buffer layers, and conversion processes of the ex-situ Y-123 films on the resulting microstructures are discussed. Interfacial reactions between the substrate, buffer layers, and Y-123 films are examined. Y-123 films produced from BaF{sub 2}-based precursors deposited by e-beam evaporation or metal organic deposition (MOD) of trifluroacetates are compared in terms of their final microstructures, phase assemblage, and superconducting properties. The initial stages of processing during which phase segregation can occur, Y-123 and secondary phase development, and the degree of conversion completion in fully processed coated conductors are also examined. Implications for thick film (t > 1 {micro}m) development and structural refinements are discussed.
- Research Organization:
- Oak Ridge National Laboratory (ORNL)
- Sponsoring Organization:
- SC USDOE - Office of Science (SC)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1003282
- Country of Publication:
- United States
- Language:
- English
Similar Records
Microstructural development and control in YBa[sub 2]Cu[sub 3]O[sub y]
The microstructure of continuously processed YBa{sub 2}Cu{sub 3}O{sub y} coated conductors with underlying CeO{sub 2} and ion-beam-assisted yttria-stabilized zirconia buffer layers
Manufacturing of YBa{sub 2}Cu{sub 3}O{sub 7} coatings by low pressure and atmospheric plasma spraying for magnetic shielding applications
Conference
·
Sun Dec 31 23:00:00 EST 2000
·
OSTI ID:975815
The microstructure of continuously processed YBa{sub 2}Cu{sub 3}O{sub y} coated conductors with underlying CeO{sub 2} and ion-beam-assisted yttria-stabilized zirconia buffer layers
Journal Article
·
Mon May 01 00:00:00 EDT 2000
· Journal of Materials Research
·
OSTI ID:20216862
Manufacturing of YBa{sub 2}Cu{sub 3}O{sub 7} coatings by low pressure and atmospheric plasma spraying for magnetic shielding applications
Book
·
Fri Dec 30 23:00:00 EST 1994
·
OSTI ID:160451