Development of high Sn content bronze processed Nb/sub 3/Sn superconducting wire for high field magnets
Development of high Sn content bronze processed Nb/sub 3/Sn superconducting wire for high field magnets
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开发用于高磁场磁体的高锡含量青铜加工 Nb/sub 3/Sn 超导线材
DOI：
10.1109/tasc.2004.830344
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发表时间：
2004
影响因子：
1.8
通讯作者：
H. Wada
中科院分区：
文献类型：
--
作者：
T. Miyazaki;H. Kato;T. Hase;M. Hamada;Y. Murakami;K. Itoh;T. Kiyoshi;H. Wada
已开发出以Cu-16wt%Sn-0.3wt%Ti（16%Sn青铜）为基体的青铜加工Nb/sub 3/Sn超导线材。对于开发，采取了两步走的方法。第一步，制备两种小尺寸圆线，其青铜与铌之比(青铜比)为2.5和1.9。在650/spl deg/C或700/spl deg/C下对这些导线进行热处理，并研究了青铜比例和热处理温度对18至25 T磁场区域中的临界电流密度（J/sub c/）的影响。发现青铜比为 2.5 并在 700/spl deg/C 下加热的样品显示出所有样品中最高的 J/sub c/。第二步，我们使用 16%Sn 青铜制造商业规模的矩形截面线材。估算了该导线在高磁场区域中的 J/sub c/ n 值。结果，该线材在 22 T、2.1 K 下的 J/sub c/ 和 n 值分别为 115 A/mm/sub 2/ 和 37，证明了作为高场磁体（例如超过 920 MHz NMR 磁体）的候选超导线材的可能性。
Bronze processed Nb/sub 3/Sn superconducting wire with Cu-16wt%Sn-0.3wt%Ti (16%Sn bronze) matrix has been developed. For the development, two-step approach was taken. At the first step, two kinds of small size round wires, having a bronze to niobium ratio (bronze ratio) of 2.5 and 1.9, were prepared. Heat treatment was made on these wires at 650/spl deg/C or 700/spl deg/C and the effects of bronze ratio and heat treatment temperature on critical current density (J/sub c/) in magnetic field region from 18 to 25 T were examined. A sample with a bronze ratio of 2.5 and heated at 700/spl deg/C was found to show the highest J/sub c/ of all. In the second step, we manufactured commercial scale rectangular cross-sectioned wire using 16%Sn bronze. J/sub c/ n-value in high magnetic field region are estimated for this wire. As a result, the wire showed J/sub c/ and n-value of 115 A/mm/sub 2/ and 37, respectively, at 22 T, 2.1 K, demonstrating the possibility as a candidate superconducting wire for high field magnets such as over-920 MHz NMR magnet.