Preparation of high-Tc superconducting thick films and power conducting tubes by a low-pressure plasma spraying
Superconducting thick films of YBaCuO and BiSrCaCuO systems have been prepared using a low-pressure plasma spraying technique. The chemical composition of the deposits was very close to that of the spraying powders. After the post-annealing, films showed zero resistance temperatures: Tc of -- 90K for YBaCuO and -- 60K for BiSrCaCuO, respectively. The superconducting power tubes were successfully produced by a low-pressure plasma spraying. 100 - 200..mu..m thick YBaCuO superconducting films were deposited on the outer surface of the Ni-plated Cu tubes. After the post- annealing at 930/sup 0/C for 1 hr, the films exhibited Tc of 85 - 90K. An improved film preparation process, where a flux layer is coated on the Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub x/ matrix layer by a low-pressure plasma spraying, has been developed. Enhanced critical currents have been achieved through this process.
- Research Organization:
- Dept. of Materials Science, Tokai Univ., Hiratsuka, Kanagawa (JP); Steel Research Center, NKK Corp., Kawasaki (JP)
- OSTI ID:
- 6090202
- Report Number(s):
- CONF-880812-
- Journal Information:
- IEEE Trans. Magn.; (United States), Journal Name: IEEE Trans. Magn.; (United States) Vol. 25:2; ISSN IEMGA
- Country of Publication:
- United States
- Language:
- English
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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
DEPOSITION
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
FABRICATION
FILMS
HEAT TREATMENTS
HIGH TEMPERATURE
LOW PRESSURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PLASMA ARC SPRAYING
POWDERS
SPRAY COATING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES