We report on the internal examination of mid-infrared chalcogenide glasses using near-infrared light to reveal light-scattering defects. The technique is demonstrated imperfectly made glass rods and fiber. This simple, non-destructive enables assessment interior convenient detection regions containing defects hidden due opacity visible light. method will presence unwanted including nucleated cr...

The devitrification of the Fe65Nb10B25 and Fe70Nb10B20 metallic glasses produced by melt spinning has been studied by calorimetry (DSC), X-ray diffraction (XRD) and transmission Mössbauer spectroscopy (TMS). Calorimetric measurements show three exothermic peaks which have been identified as the successive primary nanocrystallization of mainly a Fe23B6-type phase, the formation of bcc-Fe and met...

The devitrification of initially amorphous Ni80B20 has been studied by x-ray-absorption spectroscopy as a function of the annealing temperature. It is found that the full width at half maximum ~FWHM! of the main absorption peak at '850 eV is sensitive to the degree of amorphization of the specimen. The initial FWHM of 2.51 eV for the homogeneous amorphous Ni80B20 decreases to a value of 2.12 eV...

Using simulations and theory, we show that the cubatic phase is metastable for three model hard platelets. The locally favored structures of perpendicular particle stacks in the fluid prevent the formation of the columnar phase through geometric frustration resulting in vitrification. Also, we find a direct link between structure and dynamic heterogeneities in the cooperative rotation of partic...