Atomic structure of the {sigma}5 (210)/[001] symmetric tilt grain boundary in yttrium aluminum garnet

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The {Sigma}5(210)/[100] symmetric tilt grain boundary in YAG was produced by UHV diffusion bonding precisely oriented single crystals. The boundary has been characterized by HREM along two different directions, parallel and perpendicular to the tilt axis. Models of the atomic structure of the boundary were formed following the Coincident Site Lattice scheme. The resulting models are equivalent to twins formed at the atomic scale. The high resolution images show no rigid crystal translations away from the perfect mirror reflection relation. Comparison of the simulated images using the atomic model as input with the experimental images identifies the plane of mirror ... continued below

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11 p.

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Campbell, G.H. & King, W.E. June 24, 1996.

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The {Sigma}5(210)/[100] symmetric tilt grain boundary in YAG was produced by UHV diffusion bonding precisely oriented single crystals. The boundary has been characterized by HREM along two different directions, parallel and perpendicular to the tilt axis. Models of the atomic structure of the boundary were formed following the Coincident Site Lattice scheme. The resulting models are equivalent to twins formed at the atomic scale. The high resolution images show no rigid crystal translations away from the perfect mirror reflection relation. Comparison of the simulated images using the atomic model as input with the experimental images identifies the plane of mirror symmetry. The atomic model is shown to be in good agreement with the experimental images when viewed parallel to tilt axis, but disagrees with the images perpendicular to tilt axis. Agreement between simulated and experimental images can be improved by changing the composition of the grain boundary with respect to the bulk. To reach a more certain conclusion on the structure of the grain boundary will require additional theoretical calculations.

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11 p.

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OSTI as DE96012554

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  • Ceramic microstructures 96, Berkeley, CA (United States), 24-27 Jun 1996

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  • Other: DE96012554
  • Report No.: UCRL-JC--123186
  • Report No.: CONF-9606237--2
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 268361
  • Archival Resource Key: ark:/67531/metadc671847

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  • June 24, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 16, 2016, 2:30 p.m.

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Campbell, G.H. & King, W.E. Atomic structure of the {sigma}5 (210)/[001] symmetric tilt grain boundary in yttrium aluminum garnet, article, June 24, 1996; California. (https://digital.library.unt.edu/ark:/67531/metadc671847/: accessed May 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.