Numerical modelling of BSCCO powder deformation in the Bi-2223/Ag tape rolling process

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The rolling process is one of the key techniques in the large-scale manufacture of Bi-2223/Ag tape. Both the density of superconducting BSCCO powder inside the silver tube after the rolling process and uniformity are essential factors for the quality and performance of the final superconducting fibres. In order to investigate the deformation behaviour of BSCCO powder during the rolling process, a numerical model of Bi-2223/Ag tape deformation is proposed. This deals with the influence of process parameters, rolling diameter and thickness reduction upon the distribution of BSCCO powder density. For a type of 37-filament Bi-2223/Ag tape, the critical current density increases as the thickness reduction increases, while it decreases as the rolling diameter increases. Larger thickness reduction can improve the distribution of BSCCO powder density, but the change of rolling diameter has little influence on this distribution.

Document Type: Research Article


Publication date: June 1, 2005

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