Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-23T11:57:26.041Z Has data issue: false hasContentIssue false
  • English
  • Français

Sintering characteristics of Y–Ba–Cu–oxide–Agx superconductors

Published online by Cambridge University Press:  31 January 2011

L. C. Pathak ,
S. K. Mishra ,
D. Bhattacharya  and
K. L. Chopra
L. C. Pathak
Affiliation:
National Metallurgical Laboratory, Jamshedpur, 831 007, India
S. K. Mishra
Affiliation:
National Metallurgical Laboratory, Jamshedpur, 831 007, India
D. Bhattacharya
Affiliation:
Materials Science Centre, Indian Institute of Technology, Kharagpur, 721 302, India
K. L. Chopra
Affiliation:
Department of Physics, Indian Institute of Technology, Delhi, 110 016, India
Get access

Abstract

The sintering characteristics of Y–Ba–Cu–oxide (YBCO)–Agx (x = 0 to 1.2) using thermomechanical analyzer were systematically investigated to understand the sintering mechanism of the metal superconductor composites. The addition of Ag was observed to lower the sintering temperatures, and the apparent densities of the sintered compacts increased with x from 0 to 0.6. A further increase of x above 0.6 decreased the apparent densities of the sintered compacts. The presence of Ag globules in the YBCO–Ag compacts was observed by scanning electron microscopy and energy dispersive x-ray spectroscopy. The apparent activation energies for sintering of the powder compacts were estimated and observed to vary between 900 to 2000 kJ/mol. The formation of AgOx by absorbing oxygen from YBCO and sintering atmosphere possibly controls the sintering and superconducting behavior. Incorporation of Ag into the matrix modifies the weak-link characteristics from superconductor–insulator– normal–superconductor (S–I–N–S) to superconductor–normal–superconductor (S–N–S) type.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 11 , November 1999 , pp. 4148 - 4156
Copyright
Copyright © Materials Research Society 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Tuan, W.H. and Wu, J.M., J. Mater. Sci. 28, 1415 (1993).CrossRefGoogle Scholar
2.Pavuna, D., Berger, H., Affronte, M., Vander Mass, J., Capponi, J.J., Guillot, M., Lejay, P., and Tholence, J.L., Solid State Commun. 68, 535 (1988).CrossRefGoogle Scholar
3.Peng, S.Z., Yong, Z., Fang, S.S., Yao, C.Z., Hui, C.X., and Rui, Z. Q., Solid State Commun. 69, 1067 (1989).CrossRefGoogle Scholar
4.Dwir, B., Affronte, M., and Pavuna, D., Appl. Phys. Lett. 55, 399 (1988).CrossRefGoogle Scholar
5.Weinberger, B.R., Lynds, L., Potrepka, D.M., Snow, D.B., Burila, C.T., Eaton, H.E., Cipolli, R., Tan, Z., and Budnick, J.I., Physica C 161, 91 (1989).CrossRefGoogle Scholar
6.Jin, S., Sherwood, R.C., van Dover, R.B., Tiefel, T.H., and Johnson, D.W. Jr, Appl. Phys. Lett. 51, 203 (1987).CrossRefGoogle Scholar
7.Peters, P.N., Sisk, R.C., Urban, E.W., Huang, C.Y., and Wu, M.K., Appl. Phys. Lett. 52, 2066 (1988).CrossRefGoogle Scholar
8.Kogure, T., Otto, A., and Vandersande, J.B., Physica C 157, 351 (1989).CrossRefGoogle Scholar
9.Streitz, F.H., Cieplak, M.Z., Xiao, G., Gavrin, A., Bakhshai, A., and Chien, C.L., Appl. Phys. Lett. 52, 927 (1988).CrossRefGoogle Scholar
10.Chang, C-A., Appl. Phys. Lett. 52, 924 (1988).CrossRefGoogle Scholar
11.Chen, I-G., Sen, S., and Stefanescu, D.M., Appl. Phys. Lett. 52, 1355 (1988).CrossRefGoogle Scholar
12.Matsuzaki, K., Inoue, A., and Masumoto, T., Jpn. J. Appl. Phys. 27, L195 (1988).CrossRefGoogle Scholar
13.Kohno, O., Ikeno, Y., Sadakata, N., Aoki, S., Sugimoto, M., and Nakagawa, Y., Jpn. J. Appl. Phys. 26, 1653 (1987).CrossRefGoogle Scholar
14.Sen, S., Chen, I-G., and Stefannescu, D.M., Appl. Phys. Lett. 54, 766 (1989).CrossRefGoogle Scholar
15.Ganapathi, L., Kumar, A., and Narayan, J., J. Appl. Phys. 66, 766 (1989).CrossRefGoogle Scholar
16.Pathak, L.C., Mishra, S.K., Mukunda, P.G., Godkhindi, M.M., Bhattacharya, D., and Chopra, K.L., J. Mater. Sci. 29, 5455 (1994).CrossRefGoogle Scholar
17.Kao, Y.H., Yao, Y.D., Jang, L.Y., Xu, F., Krol, A., Song, L.W., Sher, C.J., Darovsky, A., Phillips, J.C., Simmins, J.J., and Synder, R.L., J. Appl. Phys. 67, 5455 (1990).Google Scholar
18.Chopra, K.L., Bhattacharya, D., Pramanik, P., Kashyap, S.C., Gogia, B., Bhatnagar, M.C., and Pandya, D.K., in International Conference on Superconductivity—ICSC, Jan. 10–14, 1990, Bangalore, India, edited by Joshi, S.K., Rao, C.N.R, and Subramanyam, S.V. (World Scientific, Singapore, 1990), pp. 86–102.Google Scholar
19.Tzeng, Y., Holt, A., and Ely, R., Appl. Phys. Lett. 52, 155 (1988).CrossRefGoogle Scholar
20.Ekin, J.W., Larson, T.M., Bergren, N.F., Nelson, A.J., Swartzlander, A.B., Kazmerski, L.L., Panson, A.J., and Blankenship, B.A., Appl. Phys. Lett. 52, 1819 (1988).CrossRefGoogle Scholar
21.Peterson, G.G., Weinberger, B.R., Lynds, L., and Krasinski, H.A., J. Mater. Res. 3, 605 (1988).CrossRefGoogle Scholar
22.Chang, C.A. and Tsai, J.A., Appl. Phys. Lett. 53, 1976 (1988).CrossRefGoogle Scholar
23.Singh, J.P., Leu, H.J., Poeppel, R.B., Vanvoorhees, E., Goudey, G.T., Winsley, K., and Shi, D., J. Appl. Phys. 66, 3154 (1989).CrossRefGoogle Scholar
24.Joo, J., Singh, J.P., Poeppel, R.B., Gangopadhyay, A.K., and Mason, T.O., J. Appl. Phys. 71, 2351 (1992).CrossRefGoogle Scholar
25.Gangopadhyay, A.K. and Mason, T.O., Physica C 178, 64 (1991).CrossRefGoogle Scholar
26.Cahen, D., Moisi, Z., and Schwartz, M., Mater. Res. Bull. 22, 1581 (1987).CrossRefGoogle Scholar
27.Loehman, R.E., Tomsia, A.P., Pask, J.A., and Carim, A.H., Physica C 170, 1 (1990).CrossRefGoogle Scholar
28.Bhattacharya, D., Pathak, L.C., Mishra, S.K., Sen, D., and Chopra, K.L., Appl. Phys. Lett. 57, 2145 (1990).CrossRefGoogle Scholar
29.Karakaya, I. and Thompson, W.T., J. Phase Equil. 13, 137 (1992).CrossRefGoogle Scholar
30.Assel, J., Hallstedt, B., and Gauckler, L.J., J. Am. Ceram. Soc. 80, 3054 (1997).CrossRefGoogle Scholar
31.Allen, N.P., J. Inst. Met. 49, 317 (1932).Google Scholar
32.Baker, E.H. and Johnstone, J.K., Nature 205, 65 (1965).CrossRefGoogle Scholar
33de Gennes, P.G., Rev. Mod. Phys. 36, 325 (1964).Google Scholar
34.Ambegaokar, V. and Baratoff, A., Phys. Rev. Lett. 10, 486 (1963).CrossRefGoogle Scholar