Fig. 3: Composition and phase stability analysis of HEA NPs.
From: Continuous synthesis of high-entropy alloy nanoparticles by in-flight alloying of elemental metals
a, b TEM, HR-TEM and HAADF-STEM images of the HEA NPs produced with different plasma gases of hydrogen and helium by the ICJP. Scale bar, 10 nm (HR-TEM) and 100 nm (HAADF). c–f EDX elemental maps of single and multiple HEA NPs, showing homogenous distribution of the five metals in particles. Scale bar, 25 nm (single NP) and 100 nm (multiple NPs). g, h EDX line scans of individual NPs showing the spatial uniformity in their compositions; (g) HEA-H2 case and (h) HEA-He case. i, j Phase stability calculations by DFT simulation for the HEA NPs; (i) Cr0.19Fe0.22Co0.22Ni0.22Mo0.15 (HEA-H2 case) and (j) Cr0.24Fe0.23Co0.26Ni0.22Mo0.05 (HEA-He case), demonstrating a higher stability of a FCC structure over a BCC.
