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

DOI:https://doi.org/10.1557/JMR.2000.0158· OSTI ID:20216862

Holesinger, T G ^[1]; Foltyn, S R ^[1]; Arendt, P N ^[1]; Kung, H ^[1]; Jia, Q X ^[1]; Dickerson, R M ^[1]; Dowden, P C ^[1]; DePaula, R F ^[1]; Groves, J R ^[1]; Coulter, J Y ^[1]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

The microstructural development of YBa{sub 2}Cu{sub 3}O{sub y} (Y-123) coated conductors based on the ion-beam-assisted deposition (IBAD) of yttria-stabilized zirconia (YSZ) to produce a biaxially textured template is presented. The architecture of the conductors was Y-123/CeO{sub 2}/IBAD YSZ/Inconel 625. A continuous and passivating Cr{sub 2}O{sub 3} layer forms between the YSZ layer and the Inconel substrate. CeO{sub 2} and Y-123 are closely lattice-matched, and misfit strain is accommodated at the YSZ/CeO{sub 2} interface. Localized reactions between the Y-123 film and the CeO{sub 2} buffer layer result in the formation of BaCeO{sub 3}, YCuO{sub 2}, and CuO. The positive volume change that occurs from the interfacial reaction may act as a kinetic barrier that limits the extent of the reaction. Excess copper and yttrium generated by the interfacial reaction appear to diffuse along grain boundaries and intercalate into Y-123 grains as single layers of the Y-247, Y-248, or Y-224 phases. The interfacial reactions do not preclude the attainment of high critical currents (I{sub c}) and current densities (J{sub c}) in these films nor do they affect to any appreciable extent the nucleation and alignment of the Y-123 film. (c) 2000 Materials Research Society.

• OSTI ID: 20216862
• Journal Information: Journal of Materials Research, Vol. 15, Issue 5; Other Information: PBD: May 2000; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
24 POWER TRANSMISSION AND DISTRIBUTION
SUPERCONDUCTING COMPOSITES
SUPERCONDUCTING FILMS
HIGH-TC SUPERCONDUCTORS
YTTRIUM OXIDES
BARIUM OXIDES
COPPER OXIDES
CERIUM OXIDES
ZIRCONIUM OXIDES
INCONEL 625
COATINGS
PHYSICAL VAPOR DEPOSITION
INTERFACES
MICROSTRUCTURE
TEXTURE
CRITICAL CURRENT
EXPERIMENTAL DATA