Structure of Fe–Ni and Fe–Ni–S molten alloys by neutron diffraction

Cuello, G.J.; Fernández-Perea, Ricardo; Bermejo, Francisco Javier; Román-Ross, Gabriela; Campo, Javier

doi:10.1016/j.jnoncrysol.2007.05.028

Cited by 6 publications

(3 citation statements)

References 24 publications

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“…Here it was shown that other lessconventional techniques can be very useful, such as isomorphic substitution, anomalous dispersion or combination of neutron and x-ray data. These same techniques can also be used to study liquids [3,5,6], solutions [34,35] or even solid minerals [36,37], where the order around a given atom is important.…”

Section: Discussionmentioning

confidence: 99%

“…This property is very useful when the sample is maintained under extreme conditions (e.g. high pressure or high temperature [5,6]) and the conventional methods for density determination cannot be applied. The radial distribution function RDF(r ) = 4πρr 2 g(r ) is the number of atoms per unit length on the surface of a sphere of radius r .…”

Section: Monatomic Systemsmentioning

confidence: 99%

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Structure factor determination of amorphous materials by neutron diffraction

Cuello

2008

J. Phys.: Condens. Matter

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An introduction is given to structure factor determination by means of neutron diffraction. The method of isotopic substitution, which allows us to separate the partial correlation functions, is also presented. Suitable instruments, the experimental procedures, and corrections are described. Other less-conventional techniques such as isomorphic substitution and anomalous dispersion are also discussed. Finally, examples of the structure factor determination in chalcogenide, molecular, telluride and phosphate glasses are discussed in order to illustrate the usefulness of the neutron diffraction technique.

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Section: Discussionmentioning

confidence: 99%

Section: Monatomic Systemsmentioning

confidence: 99%

Structure factor determination of amorphous materials by neutron diffraction

Cuello

2008

J. Phys.: Condens. Matter

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“…10 These results mean that in metallic melts, the excess volume reflects a character of short-range order (SRO), which is determined by a combination of interatomic interactions and geometrical factors. 38,39 Based on structural analysis of the neutron diffraction data, Cuello et al 40 also showed that the coordination number (CN) of Fe 90 Ni 10 liquid is higher than that of Fe 85 Ni 15 , which is consistent with the behavior of excess volume in liquid Fe-Ni alloys.…”

Section: Discussionmentioning

confidence: 86%

Density, excess volume, and structure of Fe–Cr–Ni melts

Jeon

SanSoucie

Kaban

et al. 2020

The Journal of Chemical Physics

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The relationship between the excess volume and the structure of Fe-Cr-Ni melts is investigated using containerless levitation and in situ high-energy synchrotron x-ray diffraction techniques. The density of six hypoeutectic Fe-Cr-Ni alloys along the 72 wt. % Fe isopleth was measured in the stable and undercooled regions, and the excess volume was evaluated as a function of Cr concentration. It is found that the 72Fe-Cr-Ni alloys exhibit a positive sign of excess volume and the amount increases with increasing Cr concentration. Analysis of the structure factor and pair distribution function of the alloy family reveals that the short-range order in the melt becomes more pronounced with decreasing Cr concentration; this demonstrates a direct correlation between the excess volume and local liquid structure. A characteristic signature of the icosahedral structure is observed in the structure factor of the melts, and the potential origin of the positive excess volume of the 72Fe-Cr-Ni alloys is qualitatively discussed in relation to the icosahedral structure.

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