Abstract
Silver-clad Bi-based superconducting monocore tapes (BPSCCO) were fabricated by the conventional powder-in-tube method. The influence of heat-treatment conditions as well as mechanical treatments was studied. The dependence of J c on critical temperature, T c , transport critical current density, J c , orthogonal transport critical current density, J cn , and applied magnetic field, B, was measured under various conditions. After more than 150 h total sintering time, little of the low-Ta phase remained, and also, the value of 4 depended strongly on the total heat-treatment time. The contact surface resistivity, R c , was also measured to evaluate the quality of the interface between the Ag and the superconducting core. The uniformity of the superconducting tape along its 65-cm length was determined by short-interval voltage terminals (60 taps). The lack of uniformity in the long tape was due more to the mechanical deformation than to heat-treatment conditions.
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References
J.C. Bowker and G.A. Whitlow, Critical current enhancements in silver-clad B2Sr2CaCu2Ox wires using a statistical experimental design for heat treatment optimization, Jap. J. Appl. Phys. 32 (IA): 51 (1993).
J. Shimoyaina, J. Kase, T. Morimoto, H. Kitaguchi, H. Kumakura, K. Togano, and H. Maeda, Effect of cooling rate on critical current density for Bi2Sr2CaCu2Og+6/Ag composite tapes, Jap. J. Appl. Phys. 31 (8B): L1167 (1992).
C.H. Rosner, M.S. Walker, P. Haldar, and L.R. Motowidlo, Status of HTS superconductors: Progress in improving transport critical current densities in HTS Bi-2223 tapes and coils, Cryogenics 32 (11): 940 (1992).
V. Plechacek, Influence of multiple intermediate processing on critical current density and trapped magnetic field in Bi,Ph-Sr-Ca-Cu-0 superconductor, Cryogenics 32 (11): 1010 (1992).
Y.B. Huang, G.F. de la Fuente, M.T. Ruiz, A. Larrea, A. Badia, F. Lera, C. Rillo, and R. Navarro, Fabrication of Ag/(Bi,Pb)-Sr-Ca-Cu-O superconducting tapes, Cryogenics 33 (1): 117 (1993).
S. Koyama, U. Endo, and T. Kawai, Preparation of single 110K phase of the Bi-Ph-Sr-Ca-Cu-O superconductor, Jap. J. Appl. Phys. 27 (10): L1861 (1988).
M. Takano, J. Takada, K. Oda, H. Kitaguchi, Y. Miura, Y. Ikeda, Y. Tornii, and H. Mazaki, High-T. phase promoted and stabilized in the Bi,Pb-Sr-Ca-Cu-O system, Jap. J. Appl. Phys. 27 (6): L1041 (1988).
D.J. Brauer, D. Busch, R. Eujen, A. Gladun, and J. Hudepohl, Influence of thermomechanical treatment on critical currents in Ag-sheathed BSCCO-2223 tapes, Cryogenics 32 (11): 1052 (1992).
M. Wilhelm, H.W. Neumuller, and G. Ries, Fabrication and critical current densities of 2223BiPbSrCaCuO silver sheathed tapes, Physica C 185: 2399 (1991).
P. Haldar, J.G. Hoehn, Jr., and J.A. Rice, Enhancement in critical current density of Bi-Pb-Sr-CaCu-O tapes by thermomechanical processing: Cold rolling versus uniaxial pressing, Appl. Phys. Lett. 60 (4): 495 (1992).
K. Nomura and M. Seido, Fabrication conditions and superconducting properties of Ag-sheathed Bi-Sr-Ca-Cu-O tapes prepared by partial melting and slow cooling process, Appl. Phys. Lett. 62 (17): 2131 (1993).
T. Umemura, A. Nozaki, K. Egawa, F. Uchikawa, and K. Sato, Critical current density and flux creep in melt-processed Bi-Ph-Sr-Ca-Cu-O superconductors, Jap. J. Appl. Phys. 31 (part 1, 9A): 2698 (1992).
P. Mannhart, P. Chaudhari, D. Dimos, C.C. Tsuei, and T.R. McGuire, Critical currents in 10011 grains and across their tilt boundaries in YBa2Cu3O7 films, Phys. Rev. Lett. 61 (21): 2476 (1988).
K.E. Hautanen, M. Oussena, and J.R. Cave, Detailed analysis of magnetization data and transport critical current measurements for Ag-(Bi,Pb)SrCaCuO composites tapes, Cryogenics 33 (3): 326 (1993).
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© 1994 Springer Science+Business Media New York
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Chikaba, J. (1994). Effect of Heat Treatment on Transport Critical Current Densities in Ag-Clad Bi-Based Superconducting Tapes. In: Reed, R.P., Fickett, F.R., Summers, L.T., Stieg, M. (eds) Advances in Cryogenic Engineering Materials . An International Cryogenic Materials Conference Publication, vol 40. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9053-5_25
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DOI: https://doi.org/10.1007/978-1-4757-9053-5_25
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