Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Heating – annealing – or sintering
Patent
1993-04-01
1997-06-03
Lieberman, Paul
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Heating, annealing, or sintering
505450, 505492, 505742, 505739, 264345, 264175, 26421112, 252521, C04B 3564, C04B 35653, C04B 3550, H01B 1200
Patent
active
056354568
ABSTRACT:
A method for preparing an oxide superconductor article includes exposing the article after deformation of the article to a final heat treatment having the steps of (a) heating the article at a temperature sufficient to partially melt the article, such that a liquid phase co-exists with the desired oxide superconductor phase; and (b) cooling to and holding the article at a temperature sufficient to transform the liquid phase into the desired oxide superconductor, where no deformation occurs after the final heat treatment. The liquid phase of step (a) wets surfaces of a defect contained within the mixed phase, whereby upon transformation of the liquid in step (b) to the desired oxide superconductor, the defect is healed.
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Carter William L.
Otto Alexander
Riley, Jr. Gilbert N.
American Superconductor Corporation
Kopec M.
Lieberman Paul
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