Analysis of indentation size effect behaviour in nonlinear optical LT-TTZS single crystal

Abstract

The slow solvent evaporation approach was used to effectively generate a high-quality L-threonine doped tris thiourea zinc sulphate crystal. Single crystal x-ray analysis was performed to understand the crystalline nature of the grown substance. The mechanical properties of the as grown single crystal was investigated and discussed through the measurements done by a microhardness tester with Vicker’s indenter at room temperature. The physical properties such as microhardness, fracture toughness, brittleness index and yield strength due to the reflection of applied force were investigated and discussed. The experimental results were reasoned according to theoretical models such as Meyer's Law, Proportional Sample Resistance (PSR), Elastic/Plastic Deformation (EPD) model, and Hays–Kendall (HK) approach. The best model for the explanation of RISE behaviour through load-independent microhardness of the samples was accepted to be Hays–Kendall (HK)approachbased on the supportedresults obtained. Finally, the mechanical characteristics of L-threonine doped tris thiourea zinc sulphate crystals were explored in depth in this paper, along with plausible justifications.