Premium
Sub‐boundaries on (002) cleavages of Li 2 CO 3 single crystals
Author(s) -
Raju K. S.,
Palaniswamy M.,
Ramasamy P.,
Laddha G. S.
Publication year - 1984
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170190714
Subject(s) - grain boundary , crystallography , dislocation , materials science , etching (microfabrication) , annealing (glass) , isotropic etching , single crystal , slip (aerodynamics) , condensed matter physics , mineralogy , composite material , chemistry , microstructure , thermodynamics , physics , layer (electronics)
Linear arrays of dislocations (straight, terminating and curved) are observed on etching with 2% citric acid (002) cleavages of lithium carbonate (Li 2 CO 3 ) single crystals, grown by zone melting technique. As the dislocations are non‐uniformly spaced and disappear on successive etching, they may not be revealing low‐angle grain boundary, nor slip traces as they are terminating and curved meaning crystallographically non‐oriented. On the observation of experiments on successive etching and etching of matched pairs, it is concluded that the arrays of etch pits reveal dislocation walls (dislocation density 1.1 × 10 6 — 1.5 × 10 7 pits cm −2 ) probably created due to the localized thermal stresses released as a result of high temperature annealing of the crystal during growth. The implications are discussed.