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>Phase growth and microstructure modifications induced by annealing in highly textured superconducting Bi- 2212 thin rods
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Phase growth and microstructure modifications induced by annealing in highly textured superconducting Bi- 2212 thin rods
Bi-2212 cylindrical rods were obtained using alaser-induced directional solidification system. Although as-grown Bi-2212 samples are well textured, they do not exhibitsuperconducting behavior and, as a result, need further heattreatments. The modifications taking place during annealingwere analyzed in the present work, in particular with respect tothe evolution of the microstructure with the annealing time andthe phase content. Diffusion processes in which the Bi-2212phase grows along the thickness of the platelets take placeduring annealing. The presented results show that the physicalproperties of these samples improve during the initialapproximately 60 h of annealing and that they remain constant thereafter.
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