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Phase growth and microstructure modifications induced by annealing in highly textured superconducting Bi-2212 thin rods

Published online by Cambridge University Press:  31 January 2011

M. Mora ,
E. Martínez ,
J. C. Díez ,
L. A. Angurel  and
G. F. de la Fuente
M. Mora
Affiliation:
Departamento de Ciencia y Tecnología de Materiales y Fluidos, Instituto de Ciencia de Materiales de Arago’n (Consejo Superior de Investigaciones Cientificas—Universidad de Zaragoza), c/María de Luna 3, 50015 Zaragoza, Spain
L. A. Angurel*
Affiliation:
Departamento de Ciencia y Tecnología de Materiales y Fluidos, Instituto de Ciencia de Materiales de Arago’n (Consejo Superior de Investigaciones Cientificas—Universidad de Zaragoza), c/María de Luna 3, 50015 Zaragoza, Spain
G. F. de la Fuente
Affiliation:
Departamento de Ciencia y Tecnología de Materiales y Fluidos, Instituto de Ciencia de Materiales de Arago’n (Consejo Superior de Investigaciones Cientificas—Universidad de Zaragoza), c/María de Luna 3, 50015 Zaragoza, Spain
*
a)Address all correspondence to this author.
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Abstract

Bi-2212 cylindrical rods were obtained using a laser-induced directional solidification system. Although as-grown Bi-2212 samples are well textured, they do not exhibit superconducting behavior and, as a result, need further heat treatments. The modifications taking place during annealing were analyzed in the present work, in particular with respect to the evolution of the microstructure with the annealing time and the phase content. Diffusion processes in which the Bi-2212 phase grows along the thickness of the platelets take place during annealing. The presented results show that the physical properties of these samples improve during the initial approximately 60 h of annealing and that they remain constant thereafter.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 3 , March 2000 , pp. 614 - 620
Copyright
Copyright © Materials Research Society 2000

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References

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