Characterization of the Structure of Y-Ba-Cu-O Coated Conductors

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Transmission electron microscopy (TEM) has been applied to the microstructural investigation of YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO) thick films deposited on polycrystalline Ni-based metal substrates by pulsed laser deposition. The films were found to be strongly textured with c-axis oriented grains aligned perpendicular to the substrates. Despite the large average in-plane misorientation, as was estimated from selected area electron diffraction and x-ray diffraction, TEM inspection reveals colonies of submicron-sized grains with low angle tilt grain boundaries. The linkage of the colony structures may provide a continuous percolation pathway for the supercurrent transport in YBCO, which may provide the mechanism for ... continued below

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Kung, H.H.; Foltyn, S.R.; Arendt, P.N. & Maley, M.P. September 13, 1998.

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Transmission electron microscopy (TEM) has been applied to the microstructural investigation of YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO) thick films deposited on polycrystalline Ni-based metal substrates by pulsed laser deposition. The films were found to be strongly textured with c-axis oriented grains aligned perpendicular to the substrates. Despite the large average in-plane misorientation, as was estimated from selected area electron diffraction and x-ray diffraction, TEM inspection reveals colonies of submicron-sized grains with low angle tilt grain boundaries. The linkage of the colony structures may provide a continuous percolation pathway for the supercurrent transport in YBCO, which may provide the mechanism for the higher than expected critical current density J{sub c}. Periodic arrays of grain boundary dislocations were observed, which may serve as effective flux pinners.

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Medium: P; Size: vp.

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INIS; OSTI as DE00759252

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  • Applied Superconductivity Conference, Palm Desert, CA (US), 09/13/1998--09/18/1998

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  • Report No.: LA-UR-98-4132
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 759252
  • Archival Resource Key: ark:/67531/metadc708574

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  • September 13, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • June 13, 2016, 2:21 p.m.

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Kung, H.H.; Foltyn, S.R.; Arendt, P.N. & Maley, M.P. Characterization of the Structure of Y-Ba-Cu-O Coated Conductors, article, September 13, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc708574/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.