Nondestructive Analysis of Bi2212 Bulk Superconducting Ceramics in the C-Axis Direction

Antonio Renato Bigansolli; T.G. da Cruz; Durval Rodrigues Jr.

doi:10.4028/www.scientific.net/MSF.869.29

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HomeMaterials Science ForumMaterials Science Forum Vol. 869Nondestructive Analysis of Bi2212 Bulk...

Nondestructive Analysis of Bi2212 Bulk Superconducting Ceramics in the C-Axis Direction

Abstract:

The use of superconductors of high critical temperatures in applied superconductivity leads to higher operation temperatures and economy of cryogenic fluids. High temperature superconductor materials exhibits limited transport properties due to grain boundary weak-links and anisotropy on the critical currents. The texturing development in these superconductors decreases in an efficient way the number of high-angle grain boundaries, increasing the values of the critical current densities. Several quantitative analysis methods have been developed to study the morphologic and topologic characteristics improving our understanding of structural parameters. In this work the grain size distribution characterization of Bi₂Sr₂CaCu₂O₈₊_δ Bi2212 superconductor bulk samples heat treated under the influence of an external applied magnetic field of 5T was carried out using a processing technique and analysis of images. The analyzed images were obtained by SEM in the c axis direction. All samples showed similar microstructures on both cases, but with the use of an external applied magnetic field during the heat treatments the average grain size decreased.

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21st Brazilian Conference on Materials Science and Engineering

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Periodical:

Materials Science Forum (Volume 869)

Pages:

29-34

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.869.29

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Online since:

August 2016

Authors:

Antonio Renato Bigansolli*, T.G. da Cruz, Durval Rodrigues Jr.

Keywords:

Bi2212, C-Axis Direction, Grain Size, ImageJ

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* - Corresponding Author

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