Calorimetric measurements of liquid LaMg, MgYb and MgY alloys

Agarwal, Renu; Feufel, H.; Sommer, F.

doi:10.1016/0925-8388(94)01290-x

Cited by 39 publications

(17 citation statements)

References 6 publications

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“…This is due to the difficulties in measuring the enthalpy of formation when yttrium content increases resulting in more exothermic reactions. Also, Y has a high melting point compared to Mg and this leads to the sublimation of Mg during fusion of the metals [67]. The first principle calculation by Zhang et al [71] and Tao et al [162] for all the intermetallic compounds in the Mg-Y system showed similar enthalpy of formation values as those of Smith et al [65].…”

Section: Mg-y (Magnesium-yttrium)supporting

confidence: 66%

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Essential Magnesium Alloys Binary Phase Diagrams and Their Thermochemical Data

Mezbahul-Islam

Mostafa

Medraj

2014

Journal of Materials

101

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Magnesium-based alloys are becoming a major industrial material for structural applications because of their potential weight saving characteristics. All the commercial Mg alloys like AZ, AM, AE, EZ, ZK, and so forth series are multicomponent and hence it is important to understand the phase relations of the alloying elements with Mg. In this work, eleven essential Mg-based binary systems including Mg-Al/Zn/Mn/Ca/Sr/Y/Ni/Ce/Nd/Cu/Sn have been reviewed. Each of these systems has been discussed critically on the aspects of phase diagram and thermodynamic properties. All the available experimental data has been summarized and critically assessed to provide detailed understanding of the systems. The phase diagrams are calculated based on the most up-todate optimized parameters. The thermodynamic model parameters for all the systems except Mg-Nd have been summarized in tables. The crystallographic information of the intermetallic compounds of different binary systems is provided. Also, the heat of formation of the intermetallic compounds obtained from experimental, first principle calculations and CALPHAD optimizations are provided. In addition, reoptimization of the Mg-Y system has been done in this work since new experimental data showed wider solubility of the intermetallic compounds.

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Section: Mg-y (Magnesium-yttrium)supporting

confidence: 66%

“…Agarwal et al [67] measured calorimetrically the enthalpy of mixing of the Mg-Y liquid near the Mg-rich region (up to 21.8 at.% Y) at different temperatures. Activity of Mg was measured by Gansen et al [68] using the vapour pressure technique.…”

Section: Mg-y (Magnesium-yttrium)mentioning

confidence: 99%

Essential Magnesium Alloys Binary Phase Diagrams and Their Thermochemical Data

Mezbahul-Islam

Mostafa

Medraj

2014

Journal of Materials

101

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“…19 Enthalpy of mixing in liquid Mg-Y alloys at 727°C. Comparison of experimental data (Agarwal et al [69] ) with optimizations from the present study and by Ran et al, [65] Lukas, [67] and Fabrichnaya et al [68] Fig. 20 Calculated entropy of mixing in liquid Mg-Y alloys at 727°C.…”

Section: The Mg-y Systemmentioning

confidence: 58%

“…[42,[71][72][73][74][75][76] Model parameters of the Mg 24 Y 5 phase were slightly changed from those of Fabrichnaya et al [68] in order to reproduce the reported phase boundary with Mg(HCP) more accurately. Figure 19 shows calorimetric data [69] for the integral enthalpies of mixing in liquid alloys along with calculations from the present and earlier optimizations. In the present study, the MQM was used for the liquid with the composition for maximum ordering at X Y = 1/3.…”

Section: The Mg-y Systemmentioning

confidence: 97%

“…Later, Lukas [67] revised the optimization using different modeling for the solid solutions. The system has been reoptimized by Fabrichnaya et al, [68] using more recent calorimetric data for the liquid alloys [69] and crystal structure data for the intermetallic phases, [42,70] modeling Mg 24 Y 5 , Mg 2 Y (Laves-C14), and MgY (BCC-B2) using the CEF, [14] and treating MgY as an ordered BCC phase. Generally, this latest optimization by Fabrichnaya et al [68] reproduces most of the experimental information well except for the phase boundary between HCP(Mg) and Mg 24 Y 5 .…”

Section: The Mg-y Systemmentioning

confidence: 99%

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Critical Evaluation and Thermodynamic Optimization of the Binary Systems in the Mg-Ce-Mn-Y System

Kang

Pelton

Chartrand

et al. 2007

J Phs Eqil and Diff

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Critical evaluation and thermodynamic optimization have been carried out for the Mg-Ce, MgMn, Mg-Y, Ce-Mn, Ce-Y, and Mn-Y binary systems. All phase diagrams and thermodynamic data such as enthalpies of mixing, heats of formation, etc., were considered to obtain one set of model parameters of the Gibbs energies of all phases, which can reproduce the experimental data within experimental error limits. For the liquid alloys, the Modified Quasi-chemical Model in the pair approximation was used to treat short-range-ordering.

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La-Mg (Lanthanum-Magnesium)

Predel¹

Landolt-Börnstein - Group IV Physical Chemistry

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Calorimetric measurements of liquid LaMg, MgYb and MgY alloys

Cited by 39 publications

References 6 publications

Essential Magnesium Alloys Binary Phase Diagrams and Their Thermochemical Data

Essential Magnesium Alloys Binary Phase Diagrams and Their Thermochemical Data

Critical Evaluation and Thermodynamic Optimization of the Binary Systems in the Mg-Ce-Mn-Y System

La-Mg (Lanthanum-Magnesium)

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