Fig. 5
From: Origin of large plasticity and multiscale effects in iron-based metallic glasses
Crystal-like cluster determination. a Mapping of the local atomic arrangement retrieved by autocorrelation analysis of the HRTEM image in Fig. 4. Red = crystal-like structures, gray = amorphous matrix. b Mask used for the calculation of the volume fraction of these nanocrystal clusters. c Energy-loss spectrum from a 8 nm thickness region of Fe50Ni30P13C7 BMG. I0 = number of electrons having lost no energy (the zero-loss peak), It = total number of electrons in the EELS, t = average thickness of the analyzed region, λ = characteristic mean free path for the inelastic scattering of the material. d Filtered HRTEM image after autocorrelation analysis, insets 1–4 display the change in FFT patterns. e X-ray diffraction reveals broad diffraction maxima with no detectable crystalline peaks (scale bars 2 nm). The spatial distribution of nanocrystal clusters retrieved by autocorrelation analysis of HRTEM images from different regions, and volumetric nanocrystal cluster fraction for each region in dimensions of 21 nm × 21 nm. f The dispersion of nanocrystal clusters imaged from the bright zones in LM STEM. g The dispersion of nanocrystal clusters imaged from the relatively darker zones in LM STEM. The average volumetric fraction of the nanocrystal cluster regions (marked in pink) in (f) and (g) are 19.6 ± 1.1 μm and 13.9 ± 3.1 μm, respectively
