Mechanical Properties Study of Borosilicate Glass Loaded with Vanadium and Cobalt by Nanoindentation Technique

Nanoindentation test is used to investigate the mechanical properties of borosilicate glass with composition (mol%) 40 Na₂B₄O₇ - 40 SiO₂ - (20– x) V₂O₅ - x Co₂O₃, with x=0, 1, 3, and 5 mol% were prepared by melt quenching technique at 1373 K. A load-displacement curve was plotted and used to extract some mechanical properties of the glass samples. The creep deformation behavior of the glass composition was studied; the maximum creep rate was observed for the sample that contains the highest vanadium ratio, while the creep rate decreased with decreasing vanadium concentration in glass samples. The hardness and the reduced modulus of elasticity were obtained. The Maxwell-Voigt model was applied to investigate the relaxation kinetics and deformation of the bulk glass.