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Reversible dislocation motion under contact loading in LiNbO3 single crystal
Journal article   Peer reviewed

Reversible dislocation motion under contact loading in LiNbO3 single crystal

Sandip Basu, Aiguo Zhou and Michel W. Barsoum
Journal of materials research, v 23(5), pp 1334-1338
01 May 2008

Abstract

Materials Science Materials Science, Multidisciplinary Science & Technology Technology
The room temperature deformation behavior of a LiNbO3 single crystal loaded along [0001] was studied by spherical nanoindentation. The threefold symmetry of the indentation marks was attributed to the formation of (10 (1) over bar2) twins that reorient the basal planes to allow for basal slip, which is manifested by the formation of fully reversible, hysteretic loops upon cyclic loading. The differences in energy dissipation, threshold stresses, and loop shapes for the three different radii tips are attributed to the different sized twins that form. The results are consistent with our model for the formation of incipient kink bands within the twins.

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Materials Science, Multidisciplinary
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