Plastic deformation of LiNbO3 single crystals

E. Fries , A. Péter

High temperature (> 0.8 TM) plastic deformation of ferroelectric monodomain LiNbO3 single crystals is reported. Different stress orientations have been chosen and basal, prismatic and pyramidal glide planes could be activated. A detailed analysis of the glide elements is made by means of optical, chemical etching and X-ray topography observations, as well as mechanical considerations (CRSS). The basal glide system (0001) <1210> with a CRSS of 13 MPa seems easier to activate than the prismatic glide system {1120} <1101> whose CRSS is 15 MPa, the pyramidal glide system {1102} <1101> with a CRSS of 17-18 MPa being the hardest to activate.

Mots clés: dislocation etching; ferroelectric materials; lithium compounds; slip; X ray diffraction examination of materials; high temperature; prismatic glide; critical resolved shear stress; optical studies; plastic deformation; ferroelectric monodomain; pyramidal glide; chemical etching; X ray topography; basal glide; LiNbO sub 3 single crystals

Domaines: Articles anciens

E. Fries, A. Péter. Plastic deformation of LiNbO3 single crystals. Revue de Physique Appliquée, 1987, 22 (11), pp.1353-1359. ⟨10.1051/rphysap:0198700220110135300⟩. ⟨jpa-00245685⟩