Composite Ceramic Superconducting Filaments for Superconducting Cable
Abstract
This is the first progress report of a five month program to demonstrate the feasibility of manufacturing superconducting wires from YBa2Cu307-x, consisting of a small ceramic core with a copper cladding. The critical current will be enhanced by creating a <010> fiber texture in the ceramic using a combination of green particle orientation and controlled recrystallization. The ceramic core will be manufactured by solution dry- spinning of a mixture of the superconducting ceramic powder with appropriately chosen polymers, solvents, and additives. The dry-spun fibers will be sintered and then clad with copper or other metals by electroplating, or mechanical cladding. The objectives of the program are to demonstrate the dry spinning process, the sintering, and the cladding process, and to determine the effect of microstructural texturing on the critical current. The electrical and physical properties of the filaments are to be characterized. The process for synthesizing YBa2Cu307-x from copper oxide, yttrium oxide, and barium carbonate has been scaled up and improved. Problems involving retention of the barium carbonate have been overcome, and a sinterable powder is prepared after a single calcination reaction at 800 deg c. The powder readily sinters to around 94% of theoretical density.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 13, 1987
- Accession Number
- ADA187833
Entities
People
- John W. Halloran