Abstract
A basic study of the stability of the Bi2Sr2CaCu2Ox phase has been carried out in order to identify the composition and processing conditions for optimum superconducting properties. Analytical electron microscopy has been used to follow the crystallization of this phase during annealing in the solid state as well as from the melt. The crystal chemistry and phase purity is found to depend strongly on the processing conditions. Significant differences in crystallization behavior may be related to kinetic limitations of oxygen transport. The Bi2Sr2CaCu2Ox phase has also been subjected to thermomechanical processing in order to improve our understanding of the deformation processes involved during fabrication of wires and tapes. It has been found that mechanical deformation can have significant effects on the microstructure of the material which in turn result in changes in superconducting properties.
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Miller, D.J., Holesinger, T.G., Routbort, J.L. et al. Crystallization and stability of the Bi2Sr2CaCu2Ox superconductor. J. Electron. Mater. 22, 1263–1268 (1993). https://doi.org/10.1007/BF02818070
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DOI: https://doi.org/10.1007/BF02818070