Patent ID: 6069116
Filing Date: 2000-05-30
Classification: H01L,Y10T

Abstract:
A method of manufacture of an elongated bismuth-strontium-calcium-copper-oxide (BSCCO) superconducting article, comprising the steps of:forming a bundle including a plurality of billets, each billet comprising a constraining metal substantially surrounding at least one filament comprising a dominant amount of a tetragonal BSCCO phase with selected intermediate phases;thermomechanically consolidating said bundle to form a multifilamentary precursor article by applying pressure and heat to the bundle to cause interdiffusion of said constraining metal at the interfaces between said metal and said filaments and substantially complete elimination of voids in said bundle;completing said consolidation step before any high strain longitudinal deformation is performed on the bundle;heating said article at a second selected processing temperature in an inert atmosphere with a second selected oxygen partial pressure for a second selected time period, thereby forming a dominant amount of an orthorhombic BSCCO phase in the reacted mixture;performing texture-inducing deformation on said article to form an elongated precursor article of a desired texture; andheating said elongated precursor article at a third selected processing temperature in an inert atmosphere with a third selected oxygen partial pressure for a third selected time period, thereby converting at least a portion of said orthorhombic BSCCO phase to said final superconducting BSCCO material.