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Sound wave velocities of fcc Fe–Ni alloy at high pressure and temperature by mean of inelastic X-ray scattering

Titelangaben

Kantor, Anastasia ; Kantor, Innokenty ; Kurnosov, Alexander ; Kuznetsov, Alexei Y. ; Dubrovinskaia, Natalia ; Krisch, Michael ; Bosak, Alexeï ; Dmitriev, Vladimir ; Urusov, Vadim S. ; Dubrovinsky, Leonid:
Sound wave velocities of fcc Fe–Ni alloy at high pressure and temperature by mean of inelastic X-ray scattering.
In: Physics of the Earth and Planetary Interiors. Bd. 164 (14 September 2007) Heft 1–2 . - 83 - 89.
ISSN 1872-7395
DOI: https://doi.org/10.1016/j.pepi.2007.06.006

Volltext

Link zum Volltext (externe URL): Volltext

Angaben zu Projekten

Projektfinanzierung: Deutsche Forschungsgemeinschaft
ESF

Abstract

Knowledge of the high-pressure and high-temperature elasticity of Fe–Ni alloy with low (5–25%)Ni content is crucial for geosciences since it is probably the major component of the cores of the terrestrial planets and the Moon. Here we present a study of a FeNi alloy with 22at.% of Ni to 72 {GPa} and 715 K, using inelastic X-ray scattering (IXS) and X-ray powder diffraction from polycrystalline material. The X-ray diffraction (XRD) study revealed stability of the face centred cubic (fcc) over the hexagonal close packed (hcp) phase in the whole investigated pressure–temperature range. The study presents first investigations of elasticity of fcc phase of iron–nickel Fe0.₇₈Ni0.₂₂ alloy. The isothermal equations of state were derived at room temperature and at 715 K (K₃00 = 162(1) GPa, K′₃00 = 4.97 ( 1 ) , {V300} = 6.89(1) cm³/mol; {K₇₁₅} = 160(1) GPa, K′₇₁₅ = 4.97 ( 2 ) , {V715} = 6.96(1) cm³/mol). Inelastic X-ray measurements allow the determination of the longitudinal acoustic wave velocity VP, and provide, combined with the measured equations of state, the full isotropic elasticity of the material. We found that within experimental errors our data follow the Birch's law. We did not observe any significant deviations for fcc Fe0.₇₈Ni0.₂₂ from elastic properties of pure ɛ-iron.

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Equation of state
Institutionen der Universität: Fakultäten > Fakultät für Mathematik, Physik und Informatik > Fachgruppe Materialwissenschaften > Lehrstuhl Kristallographie
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Fachgruppe Materialwissenschaften > Lehrstuhl Kristallographie > Lehrstuhl Kristallographie - Univ.-Prof. Dr. Sander van Smaalen
Fakultäten
Fakultäten > Fakultät für Mathematik, Physik und Informatik
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Fachgruppe Materialwissenschaften
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
Eingestellt am: 24 Nov 2015 09:59
Letzte Änderung: 25 Okt 2017 11:34
URI: https://eref.uni-bayreuth.de/id/eprint/22954