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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Development of multifilamentary niobium-titanium and niobium-tin strands for the International Thermonuclear Experimental Reactor project
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Development of multifilamentary niobium-titanium and niobium-tin strands for the International Thermonuclear Experimental Reactor project

机译：为国际热核实验反应堆项目开发多丝铌钛和铌锡链

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The International Thermonuclear Experimental Reactor(ITER) device should demonstrate the scientific and technological possibility of commercial fusion energy production in large scale in order to solve the worldwide energy problem in the future. The superconducting magnet system is the key part of the ITER device to supply high magnetic fields for confining the deuterium-tritium plasma. The multifilament NbTi and Nb3Sn strands with high quality have been studied to meet the specifications of superconducting strands for fabricating poloidal field coils (PF) and toroidal field coils (TF). For NbTi strands with 8306 filaments, J(c) of 2910 A mm(-2) (4.2 K, 5 T, 0.1 mu V cm(-1)) has been obtained by a conventional process. The proposed process could be used for fabrication of long strands with a unit length more than 5000 m. By an internal tin process the multifilamentary Nb3Sn strands with a diameter of 0.79 mm and a unit length longer than 5000 in have been successfully fabricated. The highest non-.Cu Jcn (12 T, 4.2 K, 0.1 mu V cm(-1)) value of 1249 A mm(-2) has been obtained. The n-value of Nb3Sn strands is larger than 20 and the residual resistance ratio (RRR) value lies between 150 and 220. The formation of the Nb3Sn superconducting phase together with the evolution of microstructure has been investigated by neutron diffraction and scanning electron microscopy. The results indicate that the properties of NbTi and Nb3Sn strands have already met basically the specifications proposed by the ITER program. (C) 2007 Elsevier B.V. All rights reserved.
机译：国际热核实验堆（ITER）装置应证明大规模生产商业聚变能的科学和技术可能性，以解决将来的全球能源问题。超导磁体系统是ITER装置的关键部分，可提供高磁场来限制氘-等离子体。已经研究了高质量的复丝NbTi和Nb3Sn股线，以满足制造极场线圈（PF）和环形场线圈（TF）的超导股线的规格。对于具有8306细丝的NbTi股，通过常规方法已获得2910 A mm（-2）（4.2 K，5 T，0.1μV cm（-1））的J（c）。所提出的方法可用于制造单位长度大于5000 m的长条。通过内部锡工艺，已成功制造了直径0.79毫米，单元长度超过5000英寸的多丝Nb3Sn股。已获得1249 A mm（-2）的最高非Cu Jcn（12 T，4.2 K，0.1 mu V cm（-1））值。 Nb3Sn链的n值大于20，剩余电阻比（RRR）值在150至220之间。Nb3Sn超导相的形成以及微观结构的演变已通过中子衍射和扫描电子显微镜进行了研究。结果表明，NbTi和Nb3Sn链的性能已基本满足ITER程序提出的规范。 （C）2007 Elsevier B.V.保留所有权利。

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