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Zhukova, L. A.; Popel, S. I.

doi:10.1023/a:1021102704849

Cited by 5 publications

(6 citation statements)

References 1 publication

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“…Accordingly, Bi rich microdroplets constitute primarily the microheterogeneity in the melt. Zhukova and Popel 19 assumed that the absorbed boundary layers in microheterogeneous liquid eutectic melt are of ordered structure based on the densest packing of atoms in coordination Frank-Kasper polyhedra. The type of the polyhedron depends on the difference between the atomic radii of components, which is settled on the boundary surface.…”

Section: Resultsmentioning

confidence: 99%

Metastable microheterogeneity in liquid monotectic Bi–Ga alloys

Wang

Geng

Zhou

et al. 2011

International Journal of Cast Metals Research

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The electrical resistivity of liquid Bi-Ga alloys has been measured in both heating and cooling process using the four-probe method. Anomalous behaviours of resistivity with temperature appear in heating process and are irreversible in subsequent cooling process. Microheterogeneity is then proved to exist in the melt during heating and depicted by the emulsion model. The evolution of heterogeneity in liquid Bi 33?3 Ga 66?7 alloy was investigated through both isothermal and non-isothermal experiments. The results indicate that Bi 33?3 Ga 66?7 melt experiences a polydisperse-monodisperse-homogeneous state transformation upon successive heating above critical temperature.

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Section: Resultsmentioning

confidence: 99%

Metastable microheterogeneity in liquid monotectic Bi–Ga alloys

Wang

Geng

Zhou

et al. 2011

International Journal of Cast Metals Research

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“…The situation is almost identical to initial state of as-melted eutectics. Indications of the existence of domains enriched in the different components have been observed in many experiments on this kind of systems [15,16].…”

Section: Microheterogeneity Of Hypermonotectic Melts Above the Macrosmentioning

confidence: 94%

Metastable microheterogeneity of melts in eutectic and monotectic systems and its influence on the properties of the solidified alloy

Popel

Calvo-Dahlborg

Dahlborg

2007

Journal of Non-Crystalline Solids

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“…fee: V a =a 3 /4 = (n Jl ) 3 Here a is a lattice parameter. One can see that the higher the packing density, the weaker is the dependence of the magnitude of V a on rj:…”

Section: Sobososob7>mentioning

confidence: 99%

Atomic Ordering in Liquid Metals with Different Premelting Structures. Part II. Structures of Liquid Metals with Close-Packed Crystal Lattices

Zhukova¹,

Popel²

1995

High Temperature Materials and Processes

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The consideration of short-range order in the melts of close-packed metals is represented on the basis of analysis of all distinguishing maxima on the radial distribution function (RDF) of atoms in the ordered region. SOBOSOSOB7>The procedure to determine structure parameters in liquid metals by diffraction study is described in Part I of our report. Here an attempt is made to find out common and distinguishing features of liquid metals having close-packed premelting structures.In a first approximation, the close-packed crystal structure of metals may be assumed as a regular packing of spherical atoms in a short-range order. The contribution of the directional interaction there is significantly less than in metals of friable structures. The denser atomic packings occur also in their melts and result in different values of the important ratios, such as S2/S1 = 1.80 -1.90; = 1.81 -1.93.Their structures in the liquid state are much closer to the parameters of the simple liquid model (DRPHS).A complete analysis of all features of the structural factors and RDFs is necessary to discover short-range order in the melts.Comparing the first maximum abscissas of liquid fee metals with their line polyciystalline diagrams, agreement with (111) reflection is found at an accuracy of 1%. The shortest interatomic distance in the crystal, r®, is close to the abscissa of the first coordination RDFs maximum. The square under the first peak is on the average near z^1" = 11. On the basis of this data it has often been confirmed that the ordering in the melt corresponds to a crystal-like model /1,2/. Nevertheless, a more detailed analysis excludes this conception. Figure 1 represents the structural factor of liquid nickel /3/. The agreement between some maxima and polycrystalline reflections cannot be considered as Fig. 1: Structural factor and difference RDF curve of liquid nickel at 1773 Κ /8/. 1 -the line diagram of polycrystalline Ni; 2 -the coordination spheres radii in fcc-Ni and the numbers of their ζ atoms.

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Cited by 5 publications

References 1 publication

Metastable microheterogeneity in liquid monotectic Bi–Ga alloys

Metastable microheterogeneity in liquid monotectic Bi–Ga alloys

Metastable microheterogeneity of melts in eutectic and monotectic systems and its influence on the properties of the solidified alloy

Atomic Ordering in Liquid Metals with Different Premelting Structures. Part II. Structures of Liquid Metals with Close-Packed Crystal Lattices

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