Strength distribution and fracture analyses of LiNbO3 and LiTaO3 single crystals under biaxial loading

摘要

The strength distribution and fracture behaviour of miniaturized Lithium niobate (LiNbO3) and Lithium tantalate (LiTaO3) single crystals were assessed under biaxial bending. The susceptibility of these materials to environmental assisted cracking (SCCG) was studied by means of constant cross-head displacement rate experiments in air and in water. Two different sample sizes were tested and compared to assess the Weibull volume effect.