Alloy method of making a composite having superconducting capability
US5075286A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1989 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Apr 17, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49014
Abstract
A method of making a composite having superconducting capability is characterized by the steps: (1) forming a mixture of particulate yttrium or rare earth, that is alloyable with Ba and Cu, with particulate Ba, Cu, and Ag, where Ag additive is present in an amount of from 2 weight % to 30 weight % of the mixture, where the Ag additive has a particle size from 0.01 micrometer to 5 micrometers, (2) melting the mixture, (3) forming on a support surface a 10% to 30% porous ribbon of alloy having an interior Ag network, (4) removing the ribbon, (5) placing the ribbon alloy on top of a metal sheet, (6) placing a metal sheet on top of the ribbon alloy, (7) sealing the ribbon alloy within the metal sheets to form a composite, (8) uni-directional rolling the composite to reduce its cross-section, and (9) annealing the composite at from 100.degree. C. to 900.degree. C. in the presence of a source of oxygen, to provide a ceramic ribbon having contacting Ag additive particles effective to carry electrical current from the ceramic ribbon to the metal sheets at temperatures greater than 100.degree. K.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.