Fig. 1: Crystal structure and microstructure of alloys. | Nature Communications

Fig. 1: Crystal structure and microstructure of alloys.

From: A strategy to reduce thermal expansion and achieve higher mechanical properties in iron alloys

Fig. 1: Crystal structure and microstructure of alloys.The alternative text for this image may have been generated using AI.

a Schematic diagram of the alloy design strategy. The PTE and NTE represent the PTE phase (iron alloys) and NTE phase (negative thermal expansion compounds) respectively. The MVE represents the magnetovolume effect. b NPD refinement results of Z2 at 300 K. c Crystal structures of the PTE and NTE phases. d SEM images and IPF of Z2 in the longitudinal-transverse (LD-TD) and transverse-normal (TD-ND) planes. e EDS elements mapping under HRTEM. f, g HAADF-STEM image of PTE phase (f) along [110] zone axis and NTE phase (g) along [001] zone axis. The insets show the corresponding SAED patterns. h HAADF-STEM image at the phase boundary. The inset shows the corresponding FFT profile. The schematic diagram shows the semi-coherent relationship of the interface, yellow balls represent Fe atoms, purple/green balls represent Zr/Nb atoms, and the “⊥” represents dislocations. Source data are provided as a Source Data file.

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