Patent ID: 6218340
Filing Date: 2001-04-17
Classification: H01L,Y10T

Abstract:
In a process for making a superconducting conductor of the type including a longitudinally-extending ceramic superconducting oxide core within a ductile metal sheath, said process including the steps ofproviding a said sheath containing a powder of a superconductor precursor having the nominal composition of the superconducting oxide,deforming said sheath with said powder therein to reduce the cross-section thereof to substantially the cross-section of said conductor, andthereafter subjecting said sheath and powder to a plurality of heat treatments to convert said powder into said superconducting oxide core by causing phase conversion and grain growth in the superconducting precursor, the improvement wherein:after said sheath has been deformed to reduce the cross section thereof to substantially said cross-section of said conductor, andafter all except the last of said plurality of said heat treatments, said sheath and core are isostatically pressed to texture and densify said core.