| Issue |
J. Phys. Colloques
Volume 41, Number C6, Juillet 1980
THIRD EUROPHYSICS TOPICAL CONFERENCELATTICE DEFECTS IN IONIC CRYSTALS |
|
|---|---|---|
| Page(s) | C6-186 - C6-189 | |
| DOI | https://doi.org/10.1051/jphyscol:1980648 | |
LATTICE DEFECTS IN IONIC CRYSTALS
J. Phys. Colloques 41 (1980) C6-186-C6-189
DOI: 10.1051/jphyscol:1980648
A study of dislocations and inclusions in Yttrium Aluminum Garnet crystals with birefringence topography
Shu Shiu-ying, Kuo Zhoun-zhung et Fong DuanDepartment of Physics, Nanking University, Nanking, China
Résumé
L'étude a porté sur les images biréfringentes de dislocations et inclusions dans des cristaux YAG. Par cette méthode nous avons déterminé les vecteurs de Burgers de dislocations. L'effet de champ élastique étendu sur les images biréfringentes des défauts des cristaux a été expliqué.
Abstract
Birefringence images due to dislocations and inclusions in YAG crystals were studied with polarizing microscopy. Birefringence images of dislocations viewed end-on as well as viewed from the side were interpreted by Tanner and Fathers' theory with due considerations of the effect of long-range strain field. The Burgers vectors of dislocations were found to be of the type of [MATH] <111>, <100> and <110>. The effect of long-range strain field on birefringence images was elucidated.