Microstructure, texture and critical current of Ag-sheathed 2223 multifilament tapes

Content Provider	Scilit
Author	Liu, Y. L. Wang, W. G. Poulsen, H. F. Vase, P.
Copyright Year	1999
Description	Journal: Superconductor Science and Technology An Ag-sheathed 2223 multifilament tape was produced by the powder-in-tube method. The various parts of the tape were heat treated at different temperatures under reduced oxygen partial pressure. The microstructure and the texture were characterized by synchrotron x-ray diffraction and SEM and correlated with $J_{c}$. In the low temperature range (<826 °C), the 2223 fraction and the c-axis alignment of 2223 grains increased with increasing temperature. A significant increase of $J_{c}$ (from 1 to 41 kA $cm^{-2}$) was observed in this range, indicating that the phase purity and the texture were the major controlling factors. In the medium temperature range (826-830 °C), the 2223 fraction and the grain alignment tend to saturate, and $J_{c}$ remains nearly constant at a level of 40 kA $cm^{-2}$. In the high temperature range (830-836 °C), the 2223 fraction and the grain alignment remained unchanged but $J_{c}$ decreased with increasing temperature. The drop in $J_{c}$ was related to the presence of an amorphous phase and a small amount of 2201 phase, indicating that the grain connectivity has become the major current-limiting factor. The variations in the filament shape, density and alignment within the multifilament tape were characterized. The influence of the inhomogeneous structure on $J_{c}$ is discussed.
Related Links	http://iopscience.iop.org/article/10.1088/0953-2048/12/6/308/pdf
Ending Page	381
Page Count	6
Starting Page	376
ISSN	09532048
e-ISSN	13616668
DOI	10.1088/0953-2048/12/6/308
Journal	Superconductor Science and Technology
Issue Number	6
Volume Number	12
Language	English
Publisher	IOP Publishing
Publisher Date	1999-01-01
Access Restriction	Open
Subject Keyword	Journal: Superconductor Science and Technology Temperature Range Multifilament Tape
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Materials Chemistry Metals and Alloys Condensed Matter Physics Electrical and Electronic Engineering