Effect of deformation of parameters on interface morphology of silver-sheathed high-temperature superconductor tapes

We have produced a series of Ag sheathed BiSrCaCuO tapes with a systematical variation of some of the deformation parameters to investigate effects on the distortion of the sheath-core interface, which often shows a wavy morphology (“sausaging”). The increase of the powder density has been measured...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 1995-08, Vol.250 (1), p.170-174
Main Authors: Zeimetz, B., Pan, A., Dou, S.X.
Format: Article
Language:English
Subjects:
Applied sciences
Electrical engineering. Electrical power engineering
Exact sciences and technology
Materials
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Summary:We have produced a series of Ag sheathed BiSrCaCuO tapes with a systematical variation of some of the deformation parameters to investigate effects on the distortion of the sheath-core interface, which often shows a wavy morphology (“sausaging”). The increase of the powder density has been measured directly by monitoring the volume of the tapes during the deformation. Using silver particles as a “tracer”, the non-uniform, wavy powder flow can be observed also inside the bulk oxide core. We develop a simple model of the deformation process, based on a relaxation concept, and compare its quantitative predictions with our experimental results and with those of other groups.
ISSN:0921-4534
1873-2143
DOI:10.1016/0921-4534(95)00364-9