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    • 9. 发明授权
    • Production method of Nb3Al superconducting multifilamentary wire
    • Nb3Al超导复丝的生产方法
    • US06570096B2
    • 2003-05-27
    • US09864228
    • 2001-05-25
    • Takao TakeuchiNobuya BannoToshihisa AsanoHitoshi Wada
    • Takao TakeuchiNobuya BannoToshihisa AsanoHitoshi Wada
    • H01B1200
    • H01L39/2409C30B25/105C30B29/04Y10S420/901Y10S505/806Y10S505/815Y10T29/49014
    • This invention provides a production method of Nb3Al superconducting multifilamentary wire based on rapid-heating, quenching and transformation method, capable of producing a high-performance Nb3Al superconducting multifilamentary wire by improving critical temperature thereof, upper critical field and critical current density. Upon a first stage heat treatment of beating a composite, in which bcc phase Nb—Al supersaturated solid solution is dispersed in Nb matrix, the bcc phase Nb—Al supersaturated solid solution ordered in temperature rise process is made disordered at an initial phase thereof and a non-reacting portion located adjacent is heated using a reaction heat generated when transforming this disordered bcc phase to A15 phase. Then, disordering of the bcc phase is promoted while propagating a high-temperature transformation region so as to automatically progress high-temperature beat treatment. As a result, a reaction-transformation is caused to block stacking fault from being generated in the A15 phase and crystal grain from being coarse and then, a second stage heat treatment for improving a long range ordering of the A15 phase is carried out.
    • 本发明提供了一种基于快速加热,淬火和转化方法的Nb3Al超导多丝线的制造方法,其能够通过改善其临界温度,上临界场和临界电流密度来生产高性能Nb3Al超导复丝。 在将bcc相Nb-Al过饱和固溶体分散在Nb基体中的复合材料的第一阶段热处理中,在升温过程中排列的bcc相Nb-Al过饱和固溶体在其初始阶段变得无序, 使用在将该无序bcc相变换为A15相时产生的反应热来加热位于相邻的非反应部分。 然后,在传播高温转化区域的同时促进bcc相的无序化,以自动进行高温节拍处理。 结果,导致反应转变阻止在A15相中产生的堆垛层错和晶粒粗糙化,然后进行用于改善A15相的长程排序的第二阶段热处理。