为解决Bi-2212线材冷加工过程中的断芯问题,采用中间银丝增强的19×18+1芯的导体结构代替常规的85 ×7芯的结构,并研究关键热处理参数熔化温度对线材微观结构及载流性能的影响,同时对微观结构的形成机制进行了解释.研究发现,采用中间银丝加强的19×18+1芯结构,可有效防止线材的断芯,显著改善了线材的加工均匀性,线材的载流性能增加了40％.熔化温度对线材载流性能影响较大,温度过高或过低都会导致线材中出现大量尺寸与芯丝尺寸相当的(Sr,Ca)xCuyOδ(AEC相),严重阻碍电流的流通.合适的熔化温度烧结的线材中AEC相较少且尺寸较小,另外还存在较多芯丝间的桥连,增加了电流的输运通道,改善了线材的载流性能.
参考文献
| [1] | Weijers H.W.;Hascicek Y.S.;Marken K.;Mbaruku A.;Meinesz M.;Miao H.;Thompson S.H.;Trillaud F.;Trociewitz U.P.;Schwartz J. .Development of a 5 T HTS insert magnet as part of 25 T class magnets[J].IEEE Transactions on Applied Superconductivity: A Publication of the IEEE Superconductivity Committee,2003(2):1396-1399. |
| [2] | Markiewicz W.D.;Miller J.R.;Schwartz J.;Trociewitz U.P.;Weijers H.W. .Perspective on a Superconducting 30 T/1.3 GHz NMR Spectrometer Magnet[J].IEEE Transactions on Applied Superconductivity: A Publication of the IEEE Superconductivity Committee,2006(2):1523-1526. |
| [3] | Godeke A.;Cheng D.;Dietderich D. R.;English C. D.;Felice H.;Hannaford C. R.;Prestemon S. O.;Sabbi G.;Scanlan R. M.;Hikichi Y.;Nishioka J.;Hasegawa T. .Development of Wind-and-React Bi-2212 Accelerator Magnet Technology[J].IEEE Transactions on Applied Superconductivity: A Publication of the IEEE Superconductivity Committee,2008(2):516-519. |
| [4] | Godeke, A;Acosta, P;Cheng, D;Dietderich, DR;Mentink, MGT;Prestemon, SO;Sabbi, GL;Meinesz, M;Hong, S;Huang, Y;Miao, H;Parrell, J .Wind-and-react Bi-2212 coil development for accelerator magnets[J].Superconductor Science & Technology,2010(3):034022:1-034022:6. |
| [5] | Hua Zhiqiang,Li Yuenan,Zheng Minghui.Commercial Process of Bi-based 2212 Single Phase Superconducting Precursor Powder[J].稀有金属（英文版）,1999(01):60-64. |
| [6] | Barzi, E.;Lombardo, V.;Turrioni, D.;Baca, F. J.;Holesinger, T. G. .BSCCO-2212 Wire and Cable Studies[J].IEEE Transactions on Applied Superconductivity: A Publication of the IEEE Superconductivity Committee,2011(3):2335-2339. |
| [7] | Matsumoto, A.;Kitaguchi, H.;Kumakura, H.;Hikichi, Y.;Nakatsu, T.;Hasegawa, T. .Microstructure and Critical Current Properties of Bi-2212 Round Wires Fabricated With Different Nominal Compositions[J].IEEE Transactions on Applied Superconductivity: A Publication of the IEEE Superconductivity Committee,2011(3):2800-2803. |
| [8] | Myers, C. S.;Susner, M. A.;Motowidlo, L.;Distin, J.;Sumption, M. D.;Collings, E. W. .Transport, Magnetic, and SEM Characterization of a Novel Design Bi-2212 Strand[J].IEEE Transactions on Applied Superconductivity: A Publication of the IEEE Superconductivity Committee,2011(3):2804-2807. |
| [9] | Nachtrab, W. T.;Liu, X. T.;Wong, T.;Schwartz, J. .Effect of Solidification Conditions on Partial Melt Processed Bi2212/Ag Round Wire[J].IEEE Transactions on Applied Superconductivity: A Publication of the IEEE Superconductivity Committee,2011(3):2795-2799. |
| [10] | S Rath;L Woodall;C Deroche .Quantitative phase analysis of PBSCCO 2223 precursor powders - an XRD/Rietveld refinement study[J].Superconductor Science & Technology,2002(4):543-554. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%