Journal of Materials Science

, Volume 27, Issue 10, pp 2719–2725

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

Authors

  • F. Liu
    • Thayer School of EngineeringDartmouth College
  • I. Baker
    • Thayer School of EngineeringDartmouth College
  • G. Yao
    • Department of Materials ScienceState University of New York at Stony Brook
  • M. Dudley
    • Department of Materials ScienceState University of New York at Stony Brook
Papers

DOI: 10.1007/BF00540695

Cite this article as:
Liu, F., Baker, I., Yao, G. et al. J Mater Sci (1992) 27: 2719. doi:10.1007/BF00540695

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.

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Copyright information

© Chapman & Hall 1992