Thermo-mechanical and physicochemical features in Pseudo-binary Se-AgX chalcogenide glassy system

Abstract

Micro-indentations were made on new samples of the Se₁₀₀(AgX)₀ and Se₉₅(AgX)₅ (where X = Cl, Br, & I) systems to perform hardness measurement studies at different loads. Numerous models and methodologies, such as Meyer's law, the elastic/plastic deformation theory, Hays-Kendall's method, and the energy balance model, were used to assess the gathered Vickers microhardness data. DSC techniques were used to identify events related to thermal glass transition. Essential mechanical qualities that have been assessed include several thermos-mechanical parameters, such as the modulus of elasticity (E), the least micro-void formation energy (E_h), the micro-void volume (V_h), etc. Furthermore, a variety of physicochemical characteristics have been theoretically computed, such as the average coordination number (<r>), average heat of atomization (H_s), total constraints per atom (N_c), and the axial (n_β) and radial (n_α) strength of the bonds.

The findings highlight that the various thermo-mechanical parameters examined in this work reach their optimized values in the case of the Se₉₅(AgBr)₅ sample. Furthermore, molar volume (V_m), compactness (δ), and density (ρ) have been computed both theoretically and experimentally.