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Synthesis, characterization and first principle modelling of the MAB phase solid solutions: (Mn1-xCrx)(2)AlB2 and (Mn1-xCrx)(3)AlB4
Journal article   Open access

Synthesis, characterization and first principle modelling of the MAB phase solid solutions: (Mn1-xCrx)(2)AlB2 and (Mn1-xCrx)(3)AlB4

Luke A. Hanner, Hussein O. Badr, Martin Dahlqvist, Sankalp Kota, David Raczkowski, Johanna Rosen and Michel W. Barsoum
Materials research letters, v 9(2), pp 112-118
01 Feb 2021
DOI: https://doi.org/10.1080/21663831.2020.1845834
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https://doi.org/10.1080/21663831.2020.1845834View
Published, Version of Record (VoR)CC BY V4.0,  Open

Abstract

Materials Science Materials Science, Multidisciplinary Science & Technology Technology
The MAB phases are a family of layered ternary transition metal borides, with atomically laminated crystal structures comprised of transition metal boride (M-B) layers interleaved by single, or double, Al (A) layers. Herein, density functional theory is implemented to evaluate the thermodynamic stability of disordered (Mn1-xCrx)(2)AlB2, and disordered and ordered (Mn1-xCrx)(3)AlB4 quaternaries. The (Mn1-xCrx)(2)AlB2 solid solutions were synthesized over the entire range of substitution. A (Mn1-xCrx)(3)AlB4 solid solution was produced, on the base of Cr3AlB4, to form (Mn0.33Cr0.66)(3)AlB4. Powder X-ray diffraction shows lattice parameter shifts and unit cell expansions indicative of successful solid solution formations.

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Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
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