Structure of eutectic liquids in the Au-Si, Au-Ge, and Ag-Ge binary systems by neutron diffraction

Prae Chirawatkul, Anita Zeidler, Philip S. Salmon, S Takeda, Yukinobu Kawakita, T Usuki, Henry Fischer

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Neutron diffraction was used to investigate the structure of the liquid alloys Au0.81Si0.19, Au0.72Ge0.28, and Ag0.74Ge0.26 with composition at or near the eutectic. For a given alloy, the measured pair distribution function is described over a wide range of distances, from 5–6 Å to beyond 20 Å, by an exponentially damped oscillatory function with a decay length and wavelength of oscillation related to the half-width at half-maximum of the principal peak in the total structure factor and to the position of this peak, respectively. This behavior is expected from solutions of the Ornstein-Zernike equations for simple pair potentials. There is no need to invoke the existence of a fractal network, as suggested by a recent analysis of the diffraction patterns measured for amorphous metallic alloys, to account for the experimental results. A reconsideration of the diffraction data for these amorphous alloys points to the same conclusion.
LanguageEnglish
Article number014203
JournalPhysical Review B
Volume83
Issue number1
DOIs
StatusPublished - 2011

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Neutron diffraction
eutectics
Eutectics
neutron diffraction
Liquids
liquids
liquid alloys
Amorphous alloys
Fractals
Diffraction patterns
Distribution functions
fractals
diffraction patterns
Diffraction
distribution functions
Wavelength
oscillations
decay
Chemical analysis
diffraction

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Structure of eutectic liquids in the Au-Si, Au-Ge, and Ag-Ge binary systems by neutron diffraction. / Chirawatkul, Prae; Zeidler, Anita; Salmon, Philip S.; Takeda, S; Kawakita, Yukinobu; Usuki, T; Fischer, Henry.

In: Physical Review B, Vol. 83, No. 1, 014203, 2011.

Research output: Contribution to journalArticle

Chirawatkul, Prae ; Zeidler, Anita ; Salmon, Philip S. ; Takeda, S ; Kawakita, Yukinobu ; Usuki, T ; Fischer, Henry. / Structure of eutectic liquids in the Au-Si, Au-Ge, and Ag-Ge binary systems by neutron diffraction. In: Physical Review B. 2011 ; Vol. 83, No. 1.
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