Journal of Materials Science

, Volume 47, Issue 13, pp 5086–5096

Dislocation structure at a \( \{ {\overline{1} 2\overline{1} 0} \}/ {\langle} 10\overline{1} 0 {\rangle} \) low-angle tilt grain boundary in LiNbO3

  • Atsutomo Nakamura
  • Eita Tochigi
  • Jun-nosuke Nakamura
  • Ippei Kishida
  • Yoshiyuki Yokogawa
Article

DOI: 10.1007/s10853-012-6373-7

Cite this article as:
Nakamura, A., Tochigi, E., Nakamura, J. et al. J Mater Sci (2012) 47: 5086. doi:10.1007/s10853-012-6373-7

Abstract

LiNbO3 is a ferroelectric material with a rhombohedral R3c structure at room temperature. A LiNbO3 bicrystal with a \( \{ {\overline{1} 2\overline{1} 0} \}/ {\langle}10\overline{1} 0{\rangle}\) 1° low-angle tilt grain boundary was successfully fabricated by diffusion bonding. The resultant boundary was then investigated using high-resolution TEM. The boundary composed a periodic array of dislocations with \( b = { 1}/ 3{\langle} \overline{1} 2\overline{1} 0{\rangle} \). They dissociated into two partial dislocations by climb. A crystallographic consideration suggests that the Burgers vectors of the partial dislocations should be \( 1/ 3{\langle}01\overline{1} 0{\rangle} \) and \( 1/ 3{\langle}\overline{1} 100{\rangle} \), and a stacking fault on \( \{ {\overline{1} 2\overline{1} 0} \} \) is formed between the two partial dislocations. From the separation distance of a partial dislocation pair, a stacking fault energy on \( \{ {\overline{1} 2\overline{1} 0} \} \) was estimated to be 0.25 J/m2 on the basis of isotropic elasticity theory.

Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Atsutomo Nakamura
    • 1
  • Eita Tochigi
    • 2
  • Jun-nosuke Nakamura
    • 1
  • Ippei Kishida
    • 1
  • Yoshiyuki Yokogawa
    • 1
  1. 1.Department of Mechanical & Physical EngineeringOsaka City UniversityOsakaJapan
  2. 2.Institute of Engineering InnovationThe University of TokyoTokyoJapan