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Compressibility, microcalorimetry, elastic properties and EELS of rhenium borides
Christopher Neun
Benedikt Petermueller
Lkhamsuren Bayarjargal
Wolfgang Morgenroth
MIGUEL AVALOS BORJA
Héctor Gabriel Silva Pereyra
Dominik Spahr
Felix Schmuck
Victor Milman
Hubert Huppertz
Bjoern Winkler
En Embargo
31-12-2020
Atribución-NoComercial-SinDerivadas
https://doi.org/10.1016/j.solidstatesciences.2018.02.016
Transition metal borides
Elastic properties
High-pressure XRD
Microcalorimetry
EELS
Density functional theory
"Based on synchrotron X-ray diffraction on phase-pure samples, we revised the bulk moduli of the rhenium borides Re7B3 (B-0 (Re7B3) = 391(5) GPa) and orthorhombic Re3B (B-0 (orthorhombic Re3B) = 393(4) GPa) and determined the bulk modulus of monoclinic Re3B (B-0 (monoclinic Re3B) = 390(3) GPa). These results agree well with the DFT calculations on the elastic properties. Microcalorimetry was employed to obtain thermodynamic data for Re7B3 and orthorhombic Re3B and we determined C-P,(298) (Re7B3) = 210(4) J/mol, Delta H-2(98)0 (Re7B3) = 40558(400) J/mol, S-298(0) (Re7B3) = 267(2) J/mol K and theta(D)(,)(298) (Re7B3) = 320(2) K, as well as C-p,(298) (Re3B)= 86(1) J/mol, Delta H-2(98)0 (Re3B) = 16950(170) J/mol, S-2(98)0 (Re3B) 112(1) J/mol K and theta(D,)(298) (Re3B) = 329(3) K. Hardness measurements were performed for Re7B3, which gave a Vickers hardness H-V(5 kgf) = 14.5(4) GPa and H-V(10 kgf) = 14.1(3) GPa. Electron energy loss spectroscopy (EELS) was performed on orthorhombic Re3B and ReB2, and the experimental spectra are well reproduced by theory in terms of their absorption edges."
Elsevier
2018
Artículo
Christopher Neun, Benedikt Petermüller, Lkhamsuren Bayarjargal, Wolfgang Morgenroth, Miguel Avalos-Borja, Hector G. Silva-Pereyra, Dominik Spahr, Felix Schmuck, Victor Milman, Hubert Huppertz, Björn Winkler, Compressibility, microcalorimetry, elastic properties and EELS of rhenium borides, Solid State Sciences, Volume 81, 2018, Pages 71-81.
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