AustralieFrV1, Main, Exploration, bibRecord, 00A774

A thermodynamic assessment of the Mg-Nd binary system using random solution and associate models for the liquid phase

Identifieur interne : 00A774 ( Main/Exploration ); précédent : 00A773; suivant : 00A775

A thermodynamic assessment of the Mg-Nd binary system using random solution and associate models for the liquid phase

Auteurs : S. Gorsse [France] ; C. R. Hutchinson [Australie] ; B. Chevalier [France] ; J.-F. Nie [Australie]

Source :

Journal of alloys and compounds [ 0925-8388 ] ; 2005.

RBID : Pascal:05-0223236

Descripteurs français

Pascal (Inist)
- Autocohérence, Liquidus, Diagramme phase, Ordre courte distance, Optimisation, Chaleur mélange, Microscopie électronique balayage, Microscopie RX, Diffraction RX, Composition chimique, Etat métastable, Modélisation, Système binaire, Etat liquide, Magnésium alliage, 8130, 65.

English descriptors

KwdEn :
- Binary systems, Chemical composition, Heat of mixing, Liquid state, Liquidus, Magnesium alloys, Metastable states, Modelling, Optimization, Phase diagrams, Scanning electron microscopy, Self consistency, Short-range order, X-ray microscopy, XRD.

Abstract

A self-consistent thermodynamic description of the Mg-Nd system is presented. Given the asymmetric shape of the liquidus in the binary phase diagram, the associate model (which captures the chemical short range ordering (CSRO) tendency of the Mg and Nd atoms) for the liquid phase was tested and compared to the random solution model. The results of the optimization show that better agreement with the available experimental data is obtained using the associate model than with the random solution model. The enthalpy of mixing in the liquid is calculated on the basis of the two models for comparison with further experimental investigations. In addition, an experimental study using scanning electron microscopy (SEM) and X-ray diffraction (XRD) has been performed on two alloy compositions to confirm the metastability of the Mg₁₂Nd phase, for which some confusion appears in the literature.

Affiliations:

Australie, France

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Le document en format XML

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<front><div type="abstract" xml:lang="en">A self-consistent thermodynamic description of the Mg-Nd system is presented. Given the asymmetric shape of the liquidus in the binary phase diagram, the associate model (which captures the chemical short range ordering (CSRO) tendency of the Mg and Nd atoms) for the liquid phase was tested and compared to the random solution model. The results of the optimization show that better agreement with the available experimental data is obtained using the associate model than with the random solution model. The enthalpy of mixing in the liquid is calculated on the basis of the two models for comparison with further experimental investigations. In addition, an experimental study using scanning electron microscopy (SEM) and X-ray diffraction (XRD) has been performed on two alloy compositions to confirm the metastability of the Mg<sub>12</sub>
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A thermodynamic assessment of the Mg-Nd binary system using random solution and associate models for the liquid phase

A thermodynamic assessment of the Mg-Nd binary system using random solution and associate models for the liquid phase

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

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