Experimental and simulation study of microstructure and magnetic properties of (AlFeMnNi)_1−xNd_x

ABSTRACT

The high-entropy alloy (Al₂₅Fe₃₀Mn₂₅Ni₂₀)_1−xNd_x (all in at.%) (AlFeMnNi)_1−xNd_x) was prepared by vacuum arc melting (AM) and casting method (CM). X-Ray Diffraction (XRD) and Scanning Electron Microscopy, transmission electron microscope and Integrated Energy-Dispersive X-ray spectroscopy were used to study the structure of our system. The (Al₂₅Fe₃₀Mn₂₅Ni₂₀)_1−xNd_x crystallises in a Face-centred cube and centred cubic (BCC), depending on the x (x = 0.00, x = 0.01 at.% Nd). The increase of Neodymium (0.01 at.% Nd) content results in the formation of BCC structure. The chemical composition analysis of FCC and BCC crystal structures, their lattice constants demonstrate that the formation of a single BCC solid solution between 760°C and 1480°C. The Korringa–Kohn–Rostoker Method and Green's function combined with coherent potential approximation were used to study the magnetoelectronic properties of (Al₂₅Fe₃₀Mn₂₅Ni₂₀)_1−xNd_x. We have obtained the value optimised of lattice parameter 2.9 Å and it is near to that obtained by experimental value using High Score programme and results XRD experimental.

KEYWORDS:

• High-entropy alloys
• electronic structure calculation
• spinodal decomposition
• transmission electron microscopy (TEM)

Disclosure statement

No potential conflict of interest was reported by the author(s).