Progress in the pilot-scale production of high-temperature-processed Nb3Al strand
Progress in the pilot-scale production of high-temperature-processed Nb3Al strand
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发表时间：
2000
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通讯作者：
F. Buta;Sumption;M. Tomsic;E. Collings
中科院分区：
文献类型：
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作者：
F. Buta;Sumption;M. Tomsic;E. Collings
介绍了一种卷筒对卷筒铌铝欧姆加热淬火装置的运行情况。讨论了温度测量和机器控制的方法，然后介绍了几卷到卷加工股的温度和温度结果。目前，12T时的最高J值为1620 A/ mm2。此外，许多不同的Nb 3al前驱体已经研究了使用短样品装置。给出了这些导线的临界电流密度J和显微镜检查结果。扫描电镜研究也已经完成了对已接收的前驱丝和层压结构的研究，这些研究在不同批次的线之间以及不同供应商之间都有很大的不同。A15岩心的光学金相分析揭示了孔隙形成与Nb:Al化学计量的关系。
The operation of a reel-to-reel Nb 3 Al ohmic heating and quenching rig is described. Methods of temperature measurement and machine control are discussed, followed by the presentation of T c and J c results for several reel-to-reel processed strands. Presently the highest J c values are 1620 A/mm 2 at 12T. Additionally, a number of different Nb 3 Al precursors have been investigated using a short sample apparatus. Critical current density, J c , and microscopy results are presented for these wires. SEM studies have also been completed on as-received precursor wires and laminate structures which vary considerably from wire batch to wire batch and also between suppliers have been observed. Optical metallography of the A15 cores revealed a connection between porosity formation and Nb:Al stoichiometry.