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X-ray Analysis of Short-Range Order in Iron–Gallium Solid Solutions

  • STRUCTURE, PHASE TRANSFORMATIONS, AND DIFFUSION
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Abstract

The atomic structure of single crystal specimens of Fe–Ga alloys containing 4, 9, and 18 at % gallium has been studied by the X-ray diffraction method. The specimens were heat treated via two modes: annealing in paramagnetic state with subsequent quenching in water and annealing in ferromagnetic state with slow cooling to room temperature. Analysis of X-ray diffraction patterns indicates that the short-range order of the D03 type is formed in the alloy with 18 at % gallium; moreover the volume fraction of regions of the D03 phase considerably increases upon annealing. In the alloys with 4 and 9 at % gallium, the short-range order of the D03 type is absent. For all compositions, near the nodes (001), (003), and (111) we observe diffuse peaks whose intensities are independent of the heat treatment mode. It is shown that their appearance is related to the presence of small clusters of B2 type. The role of the observed structural peculiarities in the formation of magnetoelastic properties of Fe–Ga alloys is discussed.

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Funding

The work is supported by the Russian Science Foundation, project no. 22-12-00179.

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Authors and Affiliations

  1. Konstantinov St. Petersburg Institute of Nuclear Physics, Kurchatov Institute Scientific Research Center, 188300, Gatchina, Leningrad oblast, Russia

    Yu. P. Chernenkov & O. P. Smirnov

  2. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, 620108, Ekaterinburg, Russia

    N. V. Ershov, Yu. N. Gornostyrev, V. A. Lukshina & D. A. Shishkin

  3. Ural Federal University, 620002, Ekaterinburg, Russia

    D. A. Shishkin

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  1. Yu. P. Chernenkov
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Correspondence to N. V. Ershov.

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Translated by E. Oborin

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Chernenkov, Y.P., Ershov, N.V., Gornostyrev, Y.N. et al. X-ray Analysis of Short-Range Order in Iron–Gallium Solid Solutions. Phys. Metals Metallogr. 123, 987–995 (2022). https://doi.org/10.1134/S0031918X22600944

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