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Process for producing ultrafine multifilamentary Nb3(Al, Ge) or Nb3(Al, Si) superconducting wire

机译:制备超细多丝Nb3(Al,Ge)或Nb3(Al,Si)超导线材的方法

摘要

A process for producing an ultrafine multifilamentary superconducting Nb3(Al,Ge) or Nb3(Al,Si) wire capable of generating a high critical current density comprising: preparing a composite core material comprising an Al-(2 - 30)at.% Ge or Si alloy 1 µm or less in thickness uniformly incorporated into a Nb matrix at a volume ratio in a range of 1:2.5 to 1:3.5 fabricating a composite wire by embedding several tens to several millions of the resulting composite core materials in a cylindrical matrix material containing Nb; forming a A15-phase filament having a lower order in crystallinity inside the composite wire by a rapid heating and quenching treatment comprising rapidly heating the composite wire to a temperature of 1,700 °C or higher in 2 seconds, followed by continuously introducing it into a molten metal; coating the composite wire in the state above with copper (Cu) which functions as a superconductivity stabilizing material; and applying a post heat treatment in the temperature range of from 650 to 900 °C to the resulting product to recover the degree of crystallinity of the Nb3 (Al,Ge) in the A15 compound.
机译:生产能够产生高临界电流密度的超细多丝超导Nb 3 (Al,Ge)或Nb 3 (Al,Si)线的方法,包括:包含厚度为1 µm或以下的Al-(2-30)%Ge或Si合金的复合芯材,其体积比在1:2.5至1:3.5范围内均匀地掺入Nb基体中通过将数十至数百万个所得的复合芯材料嵌入包含Nb的圆柱形基质材料中;通过快速加热和淬火处理在复合线材内部形成具有较低结晶度的A15相细丝,该处理包括在2秒内将复合线材快速加热至1,700℃或更高的温度,然后将其连续地引入熔融状态。金属;在上述状态下,用作为超导稳定材料的铜(Cu)覆盖复合线;对所得产物进行650至900℃的后热处理,以恢复A15化合物中Nb 3 (Al,Ge)的结晶度。

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