Thermal and mechanical induced stresses in superconducting YBa sub 2 Cu sub 3 O sub x coatings on fibers
- Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (USA)
- Georgia Institute of Technology, Atlanta, Georgia 30332 (USA)
Thermal stresses induced during cooling from the fabrication temperature of a fiber with a noncubic superconducting ceramic coating are analyzed theoretically. The coating considered has a preferred crystallographic orientation such that the {ital c} axis of the coating material is perpendicular to the fiber surface which, in turn, results in different thermal expansion coefficients in the radial and the tangential directions in the coating. The thermal stresses are shown to result both from the mismatch between the fiber and the coating, and from the thermal expansion anisotropy of the coating. Stresses due to bending of the fiber/coating to form a superconducting component are also addressed. A critical radius of curvature of bending is obtained below which segmentation of the coating is predicted.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5490169
- Journal Information:
- Journal of Applied Physics; (USA), Vol. 70:3; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BARIUM OXIDES
THERMAL STRESSES
COPPER OXIDES
YTTRIUM OXIDES
ANISOTROPY
BENDING
CHEMICAL VAPOR DEPOSITION
COATINGS
COOLING
FABRICATION
FIBERS
HIGH-TC SUPERCONDUCTORS
SUBSTRATES
SUPERCONDUCTING FILMS
THERMAL EXPANSION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL COATING
COPPER COMPOUNDS
DEFORMATION
DEPOSITION
EXPANSION
FILMS
OXIDES
OXYGEN COMPOUNDS
STRESSES
SUPERCONDUCTORS
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
360201 - Ceramics
Cermets
& Refractories- Preparation & Fabrication