| Summary: | The nanoindentation test was used to investigate the mechanical properties of borosilicate glass with a composition (mol%) of 40 Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>-40 SiO<sub>2</sub>-(20-x) V<sub>2</sub>O<sub>5</sub>-x Co<sub>2</sub>O<sub>3</sub>, with x = 0, 1, 3, and 5 mol% for samples A, B, C, and D, respectively. Samples were prepared using the melt quenching technique at 1100 °C. A load–displacement curve was plotted and used to extract select 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 contained the highest vanadium oxide content, and the creep rate decreased with a decrease in the vanadium oxide content in the glass samples. The hardness and reduced modulus of elasticity were obtained. The Maxwell–Voigt model was applied to investigate the relaxation kinetics and deformation of the bulk glass.
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