Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-29T08:12:04.529Z Has data issue: false hasContentIssue false
  • English
  • Français

Processing of High Current Density Yba2cu3ox Superconductors

Published online by Cambridge University Press:  28 February 2011

V. Selvamanickam  and
K. Salama
V. Selvamanickam
Affiliation:
Department of Mechanical Engineering, Texas Center for Superconductivity at University of Houston, Houston, TX 77004.
K. Salama
Affiliation:
Department of Mechanical Engineering, Texas Center for Superconductivity at University of Houston, Houston, TX 77004.
Get access

Abstract

A liquid phase processing method has been developed to fabricate oriented grained YBa2Cu30x samples with high current density. The current density in these samples, however, is sensitive to the microstructure which is controlled by processing parameters. Cooling rate through the peritectic temperature is found to be the most crucial factor in controlling the extent of grain orientation and in turn the bulk current carrying capacity. The evolution of the microstructure during the slow cooling process is studied by quench experiments at different temperatures. From microstructural analysis, the suitable temperature profile for the slow cooling process is chosen. Current density measurements across grains show a Jc in excess of 104 A/cm2. This implies that the weak link behavior of grain boundaries in polycrystalline superconductors can be suppressed to a considerable extent.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 279
Copyright
Copyright © Materials Research Society 1990

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

1 Jin, S., Tiefel, T.H., Sherwood, R.C., Davis, M.E., van Dover, R.B., Kammlott, G.W., Fastnacht, R.A., and Keith, H.D., Appl. Phys. Lett. 52, 2074 (1988).Google Scholar
2 Salama, K., Selvamanickam, V., Gao, L., and Sun, K., Appl. Phys. Lett. 54, 2352 (1989).Google Scholar
3 Francavilla, T.L., Selvamanickam, V., Salama, K., and Liebenberg, D.H., presented at the conference on “Critical Currents in High Tc Superconductors”, Karlsruhe, Oct. 1989, to be published in Cryogenics.Google Scholar
4 Keller, C., Kupfer, H., Meier‐Hirmer, R., Wiech, U., Selvamanickam, V., and Salama, K., presented at the conference on “Critical Currents in High Tc Superconductors”, Karlsruhe, Oct. 1989, to be published in Cryogenics.Google Scholar
5 Kupfer, H., Keller, C., Salama, K., and Selvamanickam, V., Appl. Phys. Lett. 55, 1903 (1989).Google Scholar