Microstructures and Superconducting Properties of Ag Alloy Sheathed Bi-2223 Tapes

  • Y. Tanaka
  • M. Ishizuka
  • L. L. He
  • S. Horiuchi
  • H. Maeda
Part of the Advances in Cryogenic Engineering Materials book series (ACRE, volume 42)

Abstract

Bi-2223 superconducting tapes were prepared by the powder-in-tube technique using Ag-10 at%Cu-x at%M (M=Ti, Zr or Hf, X=0 - 1.0) alloy sheaths. The alloy sheathed tapes with a very small amount doping of Ti, Zr or Hf, the doped tapes, exhibited considerably higher Jc values than those of pure Ag or Ag-10 at%Cu sheathed tapes, the non-doped tapes. The highest Jc values at 4.2 K/14 T and 77 K/0.4 T reached around 9.0x and 1.0×104 A/cm2, respectively, for the doped tapes, especially for the 0.1 – 0.03 at%Ti or 0.1 at% Hf doping. Compared with the non-doped tapes, the doped tapes show in most case larger magnetic moment. SEM microstructures observed on the core surfaces of these tapes revealed large flat-shaped Bi-2223 grains containing neither subgrains nor small stick-shaped grains. Furthermore, high resolution transmission electron microscope revealed that amorphous disc-like regions with less than 5 nm in thickness parallel to (001) plane were introduced into Bi-2223 lattice in parallel to CuC2 layer. These changes in grain morphology and existence of amorphous disc-like regions may strongly be related to the high Jc properties of the doped tapes, especially the amorphous regions may play the important role as one of pinning centers.

Keywords

Hysteresis Loop High Resolution Transmission Electron Microscope Normal Field Parallel Field Tape Surface 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    K. Heine, J. Tenbrink, and M. Thoner, High-field critical current densities in Bi2Sr2Ca1Cu2O8+x/Ag wires, Appl. Phys.Lett. 55 (1989) 2441.CrossRefGoogle Scholar
  2. 2.
    Y Yamada, K. Jikihara, T. Hasebe, T. Yanagiya, S. Yasuhara, M. Ishihara, T. Asano, and Y. Tanaka, Properties of Ag Sheathed Bi-Pb-Sr-Ca-Cu-O Superconducting Tapes Prepared by the Intermediated Pressing Process, Jpn.J. Appl. Phys. 29 (1990) L456,.CrossRefGoogle Scholar
  3. 3.
    Y. Tanaka, M. Ishizuka, F Matsumoto, and H. Maeda, CRITICAL CURRENT DHNSITY OF Bi2223 TAPES MADE BY USING AgCuAEEOY SHEATH DOPED WITH Ti, Zr, Hi OR Au, Adv. in Cryo. Eng. 40(1994) 153.Google Scholar
  4. 4.
    Y. Tanaka, M. Ishizuka, F. Matsumoto, and H. Maeda, Improved Jc Property of Bi2223 Tapes Made Using AgCu Alloy-Sheath Doped with Ti, Zr, HI or Au,to appear in Proc. of Appl. Super Conf. Boston, 1994)Google Scholar
  5. 5.
    T. Hikata, K. Sato and H. Hitotuyanagi, Ag-Sheathed Bi-Pb-Sr-Ca-Cu-O Superconducting Wires with High Critical Current Density, Jpn.J.Appl.Phys. 28 (1990) E82.CrossRefGoogle Scholar
  6. 6.
    H.K. Liu, Y.G. Guo, S.X. Dou, S.M. Cassidy, L.F. Cohen, A.D. Caplin, and N. Savvides, Pinning mechanisms in Ag-sheathed Bi(Pb)SrCaCuO tapes, Physica C, 213 (1993) 95CrossRefGoogle Scholar
  7. 7.
    A.P. Malozemoff, R. Wheeler iV, W.L. Carter, G.N. Rilwy Jr., M.A. Kirk, L. Civale and A.D. Marwick, HEAVY ION IRRADIATION OF Bi-2223SILVER-CLAD TAPES FOR SUPERCONDUCTING CURRENT DENSITY ENHANCEMENT, Adv. in Cryo.Eng. 40 (1994) 25.Google Scholar
  8. 8.
    H. Kumakura, H. Kitaguchi, K. Togano, H. Maeda, J. Shimoyama, S. Okayasu, and Y. Kaznmata, Effect of high-energy ion irradiation and electron irradiation on textureed Bi2Sr2CaCu2Ox-180-Mev Cu11 + and Br11+ irradiations and 3-Mev electron irradiation, J.Appl.Phys. 74(1)(1993) 451.CrossRefGoogle Scholar
  9. 9.
    X.J. Wu, S. Horiuchi, L. Ben-Dor, and H. Diab, Structure Evaluation in High-Tc Bi- Based Superconductors with Pb Doping Revealed by Electron Microscopy, J. Solid State. Chem. 87 (1992) 82CrossRefGoogle Scholar
  10. 10.
    S. Horiuchi, M. Hirasaka, M. Tsutsumi, K. Kosuda, M.Y. Szerer, and L. Ben-Dor, Microstructures in High-Tc Bi(Pb)-Family 2212 Superconductors as Revealed by Scanning and Transmission Electron Microscopy, Microsc.Res.Tech. 30 (1995) 258.CrossRefGoogle Scholar
  11. 11.
    M. Ishizuka, Y. Tanaka, H. Maeda, Superconducting properties and microstructures of Bi-2223 Ag-Cu alloy sheathed tapes doped with Ti, Zr or Hf ,to appear in Physica C. 13. S. Horiuchi, Fundamentals of High-Resolution Transmission Electron Microscopy, North-Holland, Amsterdam, 1994.Google Scholar
  12. 12.
    B. Hensel, G. Grasso, and R. Flukiger, Limits to the critical transport current in superconducting (Bi,Pb)2Sr2Ca2Cu3O10silver-sheathed tapesThe railway-switch model, to appear in Phys Rev.B, Vol.51(1995)Google Scholar

Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • Y. Tanaka
    • 1
  • M. Ishizuka
    • 2
  • L. L. He
    • 3
    • 4
  • S. Horiuchi
    • 3
  • H. Maeda
    • 1
  1. 1.National Research Institute for MetalsSengen, Tsukuba 305Japan
  2. 2.Sumitomo Heavy Industries, Ltd.yuhigaoka, Hiratsuka 254Japan
  3. 3.National Institute for Research in Inorganic MaterialsNamiki, Tsukuba 305Japan
  4. 4.Institute of Metal ResearchAcademia SinicaShenyangP.R.China

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