Abstract
We studied the chemical compatibility of Ag, Ag(In)alloy, Y2BaCuO5 (the so-called Y-211 green phase) and YBa2Cu3O7–δ (Y-123) phase in order to check if better grain growth and alignment with minimum contamination were possible during the Y-123melt texturing. We demonstrate that the addition of silver to Y-123 always led to an enhanced texture. The typical microstructure of the composite Y-123 plus Y-211 (that is believed essential for high critical currents in these High Tc superconductors) was not disturbed by addition of silver up to 7.5 wt%, while higher concentrations of metal led to a degradation of the texture. DTA–TG analysis was used to investigate the influence of Ag and Ag(In) alloy on the Y–Ba–Cu–O equilibria around the Y-123 phase. We found a very unexpected thermal behaviour, similar to an eutectic equilibrium, when the silver concentration was increased to35 wt%. We believe that this effect was essentially due to the increasingly higher concentration of silver that could react with the secondary phases present in the melt.
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K. Salama, V. Selvamanickam and S. Lee, Processing and properties of high-Tc superconductors, Ed. S. Jin, World Scientific, Singapore 1992, p. 157.
M. Murakami, Melt-processed high-temperature superconductors, Ed. M. Murakami, World Scientific, Singapore 1993, p. 21.
J. Valo and H. Leskela, Studies of high temperature superconductors, Ed. A. Narlikar, Nova Sci. Publ. Inc., N. Y. 1997, Vol. 25, p. 135.
M. M. Carnasciali, G. A. Costa, M. Ferretti, E. A. Franceschi and B. Zangh, High Temperature Superconductors, Material Science Monographs, 70, Ed. P. Vincenzini, Elsevier Science Publisher B.V., Amsterdam 1990, p. 159.
M. M. Carnasciali, G. A. Costa, M. Ferretti, E. A. Franceschi and B. Zangh, High Temperature Superconductors, Material Science Monographs, 70, Ed. P. Vincenzini, Elsevier Science Publisher B.V., Amsterdam 1990, p. 763.
M. M. Carnasciali, G. A. Costa, M. Ferretti and E. A. Franceschi, J. Thermal Anal., 37 (1991) 1709.
J. V. Andersen, N. H. Andersen, O. G. Mouritsen and H. F. Poulsen, Physica C, 214 (1993) 143.
N. Peng and W. Y. Liang, Physica C, 233 (1994) 61.
K. Osamura, T. Kizu and T. Oku, Physica C, 226 (1994) 113.
C. Varanasi, P. J. McGinn, V. Pavate and E. P. Kvam, Physica C, 221 (1994) 46.
Y. Oshida, N. Ogawa, J. Mirabayashi and S. Tanaka, Physica C, 185-189 (1991) 2409.
Z. L. Du, P. C. W. Fung, Z. H. He, G. H. Zhou, M. J. Li, Y. Lu and J. X. Zhang, J. Supercond., 6 (1993) 27.
I. Monot, T. Higuchi, N. Sakai and M. Murakami, Physica C, 233 (1994) 155.
D. K. Aswal, S. K. Gupta, S. C. Gadkari, K. D. Singh Mudher, L. C. Gupta, S. C. Sabharwal and M. K. Gupta, Supercond. Sci. Technol., 8 (1995) 710.
N. L. Wu, H. H. Zern and C. L. Chen, Physica C, 241 (1995) 198.
S. Sarma, G. Schindler, D. G. Haase, C. C. Kock, A. I. Kingon and A. Goyal, Physica C, 244 (1995) 287.
T. Miyamoto, J. Katagiri, K. Nagashima and M. Murakami, Proceedings of ACS 98 conference, MLA09, Palm Desert, California 13-18 Sept. 1998, in press.
K. C Goretta and N. Chen, Superconducting Materials: advances in technology and applications, 1999, in press
T. Oka, Y. Itoh, Y. Yanagi, S. Takashima, Y. Yamada and U. Mizutani, Physica C, 200 (1992) 55.
P. Rodrigues Jr., L. Ghivelder, P. Pureur and S. Reich, Physica C, 211 (1993) 13.
H. G. Lee and S. Sinha, Physica C, 231 (1994) 50.
C. J. Kim, K. B. Kim, I. H. Kuk, G. W. Hong, S. D. Park, S. W. Yang and H. S. Shin, J. Mat. Sci., 32 (1997) 5233.
S. Reich, D. Veretnik, I. Felner and U. Yaron, J. Appl. Phys., 72 (1992) 4805.
J. A. Xia, H. T. Ren, Y. Zhao, C. Andrikidis, H. K. Liu and S. X. Dou, Supercond. Sci. Tech., 6 (1993) 315.
J. Joo, J. P. Singh, R. B. Poeppel, A. K. Gangopadhyay and T. O. Mason, J. Appl. Phys., 71 (1992) 2351.
J. A. Xia, H. T. Ren, Y. Zhao, C. Andrikidis, P. R. Munroe, H. K. Liu and S. X. Dou, Physica C, 215 (1993) 152.
A. S. Parikh, B. Meyer and K. Salama, Supercond. Sci. Tech., 7 (1994) 455.
M. Murakami, Supercond. Sci. Tech., 5 (1992) 185.
U. Weisner, G. Krabbles, M. Ueltzen, G. Plewa and H. Altenburg, Physica C, 294 (1998) 17.
V. Buscaglia and M. Leoni, for kind concession.
G. A. Costa and P. Mele, Int. J. Mod. Phys., B (1998), accepted.
G. A. Costa, E. A. Francesci and P. Mele, Phil. Mag. B (1999), submitted.
Y. Nakamura, K. Furuya, T. Izumi and Y. Shiohara, J. Mater. Res., 9 (1994) 1350.
K. Salama and S. Sathyamurty, Proceedings of International Symposium of Processing and Critical Currents of HTSC, Wagga Wagga, NSW, Australia 1998, in press.
Th. Wolf, J. Crystal Growth, 166 (1996) 810.
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Costa, G.A., Franceschi, E.A. & Mele, P. The Influence of Ag and Ag(In) Alloy on Y–Ba–Cu–O Equilibrium Diagram Around the Y-123 Superconducting Phase. Journal of Thermal Analysis and Calorimetry 61, 539–549 (2000). https://doi.org/10.1023/A:1010181820663
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DOI: https://doi.org/10.1023/A:1010181820663