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Synthesis, characterization and first principle modelling of the MAB phase solid solutions: (Mn<sub>1-x</sub>Cr<sub>x</sub>)<sub>2</sub>AlB<sub>2</sub> and (Mn<sub>1-x</sub>Cr<sub>x</sub>)<sub>3</sub>AlB<sub>4</sub>

Luke A. Hanner, Hussein O. Badr, Martin Dahlqvist, Sankalp Kota, David Raczkowski, Johanna Rosén, Michel W. Barsoum

2020Materials Research Letters34 citationsDOIOpen Access PDF

Abstract

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.

Topics & Concepts

Materials scienceCharacterization (materials science)CrystallographySolid solutionPhase (matter)X-ray crystallographyPhysical chemistryNanotechnologyMetallurgyDiffractionPhysicsChemistryQuantum mechanicsOpticsMXene and MAX Phase MaterialsBoron and Carbon Nanomaterials ResearchInorganic Chemistry and Materials
Synthesis, characterization and first principle modelling of the MAB phase solid solutions: (Mn<sub>1-x</sub>Cr<sub>x</sub>)<sub>2</sub>AlB<sub>2</sub> and (Mn<sub>1-x</sub>Cr<sub>x</sub>)<sub>3</sub>AlB<sub>4</sub> | Litcius