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Studies on Microstructure - Property Relationship of Yba2Cu3O7-X + Ag2O Composite Wire

Published online by Cambridge University Press:  28 February 2011

S. Samajdar ,
Gouthama  and
S. K. Samanta
S. Samajdar
Affiliation:
Plasticity Laboratory, Department of Mechanical Engineering and Applied Mechanics, 2250 G. G. Brown, The University of Michigan, Ann Arbor, Michigan 48109‐2125, USA.
Gouthama
Affiliation:
Plasticity Laboratory, Department of Mechanical Engineering and Applied Mechanics, 2250 G. G. Brown, The University of Michigan, Ann Arbor, Michigan 48109‐2125, USA.
S. K. Samanta
Affiliation:
Plasticity Laboratory, Department of Mechanical Engineering and Applied Mechanics, 2250 G. G. Brown, The University of Michigan, Ann Arbor, Michigan 48109‐2125, USA.
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Abstract

Silver is known to act as a compatible metal host for designing a microcomposite system with the high temperature superconducting ceramic YBCO[l,3]. The unique role played by nascent silver generated from the silver monoxide precursor during sintering as well as warm compaction of the powder mix is illustrated with the help of light optical micrography. It is seen that electrical as well as mechanical properties of the bulk composite is significantly governed by its microstructure. The microstructure, in turn, could be controlled by suitable heal treatment and proper selection of the fabrication process parameters at every step. Attempting a structure‐propcrty‐processing correlation, a microstructure controlled scheme for fabricating superconducting composite product of useful shapes is discussed. Successful fabrication of thin (0.75 mm dia.) and long (450 mm) flexible wire following this route is also reported here.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 1275
Copyright
Copyright © Materials Research Society 1990

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References

1 Samanta, S.K., Samajdar, S., Durrant, W. and Gupta, M., J. Appl. Phys 66 (9), 4532 (1989.Google Scholar
2 Garland, J.C., Calabrese, J.J. and Herbert, S.T. in High‐temperature Superconductors II, edited by Capone, D.W., Butler, W.H., Battlog, B. and Chu, C.W. (Mater. Res. Soc., Pittsburgh, PA 1988) pp. 319‐321.Google Scholar
3 Samajdar, S., Kumar, A., Mallick, K. and Samanta, S.K., “A Phenomenological Model on the Deformation Mechanism of YBa2Cu3O7‐x + Ag20 Composite”, accepted for publication in J. Mater. Sci. (1989).Google Scholar
4 Gouthama, and Samanta, S.K., “Electron Microscopic Studies of Interfaces in YBa2Cu3O7‐x + Ag20 Wire Samples”, to be presented at the 7th CIMTEC‐World Ceramics Congress ‐ High Temperature Superconductors, July 2‐5,1990.Google Scholar