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Journal of Materials Science

, Volume 27, Issue 10, pp 2719–2725 | Cite as

Dislocations and grain boundaries in polycrystalline ice: a preliminary study by synchrotron X-ray topography

  • F. Liu
  • I. Baker
  • G. Yao
  • M. Dudley
Papers

Abstract

White-beam synchrotron X-ray topography has been used to image dislocations and grain boundaries in high-purity columnar-grained polycrystalline ice. It was found that screw, 30° and 60° basal dislocations with 〈 1 1 ¯2 0 〉 Burgers vectors far outnumber other dislocations: near free surfaces, the dislocations were bent because of image forces. Circular prismatic dislocation loops with [0 0 0 1] Burgers vectors and dipoles were also found. These probably formed due to thermal shock. In one sample, the dislocation structures of three grains were clearly observed simultaneously, although no dislocations were visible in the boundaries.

Keywords

Polymer Free Surface Thermal Shock Burger Vector Dislocation Structure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1992

Authors and Affiliations

  • F. Liu
    • 1
  • I. Baker
    • 1
  • G. Yao
    • 2
  • M. Dudley
    • 2
  1. 1.Thayer School of EngineeringDartmouth CollegeHanoverUSA
  2. 2.Department of Materials ScienceState University of New York at Stony BrookStony BrookUSA

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