In this work, the deformation behavior of as-prepared (AP) and structurally relaxed (SR) Cu–Zr–based nanoglasses (NGs) are investigated using nano- micro-indentation. The NGs subjected to structural relaxation by annealing them close glass transition temperature without altering their amorphous nature. indentation load, p , vs. displacement, h curves SR samples characterized discrete displaceme...

Nano-indentation at temperatures up to 600 °C has been applied the (0001) surface of highly oriented pyrolytic graphite using a spherical diamond tip (?10 ?m diameter). Cross-sectional observations indentations by dark field scanning transmission electron microscopy show an increased tendency high temperature for inelastic deformation buckling crystals with kink formation.

OBJECTIVES Extracted teeth used in dental research need to be considered infective and hence be sterilized without the materials' properties being altered. This study examined the effect of gamma radiation on the nano-mechanical properties of dentin and enamel of extracted human third molars. METHODS Whole teeth were sterilized using gamma radiation doses of 7 kGy and 35 kGy, respectively; te...

Bismuth telluride (Bi2Te3) two-dimensional (2D) nanosheets prepared by van der Waals epitaxy were successfully detached, transferred, and suspended for nano-indentation measurements to be performed on freestanding circular nanosheets. The Young's modulus acquired by fitting linear elastic behaviors of 26 samples (thickness: 5-14 nm) is only 11.7-25.7 GPa, significantly smaller than the bulk in-...

Using a combination of statistical mechanics and finite-element interpolation, we develop a coarse-grained (CG) alternative to molecular dynamics (MD) for crystalline solids at constant temperature. The new approach is significantly more efficient than MD and generalizes earlier work on the quasicontinuum method. The method is validated by recovering equilibrium properties of single crystal Ni ...

Gels of calcium-silicate-hydrates (C-S-H) are the glue that is largely responsible for the mechanical properties of cement. Despite their practical relevance, their nano-scale structure and mechanics are still mainly unexplored, because of the difficulties in characterizing them in a complex material like cement. We propose a colloidal model to investigate the gel mechanics emerging in the crit...