| Autor: |
Hanner, Luke A., Badr, Hussein O., Dahlqvist, Martin, Kota, Sankalp, Raczkowski, David, Rosen, Johanna, Barsoum, Michel W. |
| Předmět: |
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| Zdroj: |
Materials Research Letters; Feb2021, Vol. 9 Issue 2, p112-118, 7p |
| Abstrakt: |
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)2AlB2, and disordered and ordered (Mn1-xCrx)3AlB4 quaternaries. The (Mn1-xCrx)2AlB2 solid solutions were synthesized over the entire range of substitution. A (Mn1-xCrx)3AlB4 solid solution was produced, on the base of Cr3AlB4, to form (Mn0.33Cr0.66)3AlB4. Powder X-ray diffraction shows lattice parameter shifts and unit cell expansions indicative of successful solid solution formations. In this work, first-principles calculations evaluate the stability of (Mn1-xCrx)2AlB2 and (Mn1-xCrx)3AlB4 solid solutions. Experimentally, MAB phase solid solutions of (Mn1-xCrx)2AlB2 and (Mn0.33Cr0.66)3AlB4 are synthesized for the first time. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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