Grain boundary misorientations and percolative current paths in high-J c powder-in-tube (Bi,Pb)2Sr3Ca3Cu3Ox
- 22 May 1995
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 66 (21) , 2903-2905
- https://doi.org/10.1063/1.113468
Abstract
Grain orientations and grain boundary misorientations in high‐Jc, powder‐in‐tube (PIT) (Bi,Pb)2Sr2Ca2Cu3Ox (Bi‐2223) were determined using electron backscatter Kikuchi diffraction and x‐ray microdiffraction. Data collected from over 113 spatially correlated grains, resulting in 227 grain boundaries, show that over 40% of the boundaries are Σ1 or small angle (less than 15°). In addition, 8% of the boundaries are within the Brandon criterion for CSLs (sigma larger than 1 and less than 50). Grain boundary ‘‘texture maps’’ derived from the electron microscope image and orientation data reveal the presence of percolative paths between low energy boundaries.Keywords
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