Fig. 1: Electron diffraction and dark-field image of CMRO in as-annealed fcc grains. | Nature Communications

Fig. 1: Electron diffraction and dark-field image of CMRO in as-annealed fcc grains.

From: Chemical medium-range order in a medium-entropy alloy

Fig. 1: Electron diffraction and dark-field image of CMRO in as-annealed fcc grains.The alternative text for this image may have been generated using AI.

a–c Selected-area electron diffraction (SAED) patterns under the [\(011\)], [\(112\)], and [\(013\)] z.a. respectively. d Nano-beam electron diffraction pattern (NBED). [\(112\)] z.a. Yellow arrows in b–d: arrays of extra superlattice reflections. Yellow circle: extra reflection. e Lattice image. [\(112\)] z.a. Inset: FFT pattern. Yellow circle: extra reflection. Pink circle: Braggs spot of fcc phase. f IFFT image overlaid fcc lattice image, showing CMRO (circled) and CSRO regions. \({\lambda }_{{CMRO}}\) and \({\lambda }_{{fcc}}\): spacing of {311} plane for CMRO and fcc base. Inset: Close-up view of CSRO (<1 nm). g, h DF images taken by extra reflections in d and c, showing superlattice entities. Insets in g and h: close-up view of CMRO regions.

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