The structure and configuration of boundary dislocations on various low-angle tilt grain boundaries in alumina were considered, based upon the idea that the

boundary was composed of regularly arrayed edge dislocations and that the

dislocations could dissociate into partial dislocations while maintaining the hcplike

oxygen sub-lattice. The separation of the partial dislocations formed by the

dissociation was evaluated using calculations based upon elastic theory. The

calculations indicated that the width of the stacking fault region between partial

dislocations decreased with increasing tilt angle.

Structure and Configuration of Boundary Dislocations on Low Angle Tilt Grain

Boundaries in Alumina. A.Nakamura, E.Tochigi, N.Shibata, T.Yamamoto,

Y.Ikuhara: Materials Transactions, 2009, 50[5], 1008-14