THE MECHANICAL DEFORMATION PROCESS FOR PREPARING AG-SHEATHED BISRCACUO SUPERCONDUCTING TAPES

Authors
Citation
Z. Han et T. Freltoft, THE MECHANICAL DEFORMATION PROCESS FOR PREPARING AG-SHEATHED BISRCACUO SUPERCONDUCTING TAPES, Applied superconductivity, 2(3-4), 1994, pp. 201-215
Citations number
16
Categorie Soggetti
Material Science","Physics, Applied","Physics, Condensed Matter
Journal title
ISSN journal
09641807
Volume
2
Issue
3-4
Year of publication
1994
Pages
201 - 215
Database
ISI
SICI code
0964-1807(1994)2:3-4<201:TMDPFP>2.0.ZU;2-Z
Abstract
The mechanical deformation of Ag-sheathed ceramic superconducting tape s is a complicated and generally inhomogeneous process resulting in e. g. sausaging formation in the tape. In this paper we present a simple ''powder flow'' model describing the materials behaviour during the de formation process. The model implies that the final density of the cer amic core does not directly depend on the initial packing density, and the model explains how the sausaging formation depends on the flow di rection. The model picture is also applied on aspects of crystal align ment during the mechanical deformation. The conclusions are supported by experimental results where mechanical deformation of Ag-sheathed Bi SrCaCuO (BSCCO) tapes were studied.