Patent ID: 6570096
Filing Date: 2003-05-27
Classification: C30B,H01L,Y10S,Y10T

Abstract:
A production method for Nb3Al superconducting multifilamentary wire based on rapid-heating, quenching method, wherein upon a first stage heat treatment of heating a composite in which bcc phase Nbâ€”Al supersaturated solid solution is dispersed in Nb matrix, the bcc phase Nbâ€”Al supersaturated solid solution ordered in temperature rise process is made disordered at an initial phase thereof, a non-reacting portion located adjacent is heated using a reaction heat generated when transforming this disordered bcc phase to A15 phase, disordering of the bcc phase is promoted while propagating a high-temperature transformation region to automatically progress high-temperature heat treatment thereby causing a reaction-transformation to block stacking fault from being formed in the A15 phase and crystal grain from being coarse, wherein the temperature of the first stage heat treatment is 850-1,100Â° C. and holding time thereof is 1 second-1 hour, and then, a second stage heat treatment for improving a long range ordering of the A15 phase is carried out.