Free Energy of Mixing and Vapour Pressure of Liquid Ga-As, In-As, Ga-P and In-P Alloys
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Katsunori Yamaguchi
Abstract
The change of the Gibbs energy of the reaction between group IIIA and VA elements to form a liquid III-V alloy was derived for the Ga-As, In-As, Ga-P and In-P systems by combining the heat content of the alloy with the heat and entropy of formation of the equiatomic compound at a reference temperature. The obtained data were analysed by using a Redlich-Kister polynomial equation and the optimized parameters were derived for a temperature range between 873 and 1523 K and a composition range between xv = 0 and 0.5 (for the Ga-P system between xp = 0 and 0.1). The partial pressures of these liquid alloys were expressed as a function of alloy composition and temperature. Partial pressure and total pressure-composition-temperature diagrams were constructed.
Abstract
Die Änderungen der Freien Energie, die bei Reaktionen zwischen Elementen der III. und V. Hauptgruppe des Periodensystems bei Bildung flüssiger Legierungen auftreten, wurden für die Systeme Ga-As, In-As, Ga-P und In-P abgeleitet. Mit Hilfe der thermodynamischen Analyse wurde ΔG aus den Warmeinhalten der Legierungen und den Bildungsenthalpien und Bildungsentropien der äquiatomaren Verbindung bei einer Referenztemperatur berechnet.
Die erhaltenen Ergebnisse werden durch ein Redlich-Kister Polynom far den Temperaturbereich zwischen 873 und 1523 K und einem Konzentrationsbereich von xv = 0 bis 0,5 (für das System Ga-P zwischen 0 und 0,1) optimiert. Die Darstellung der partiellen Dampfdrücke dieser flüssigen Legierungen erfolgt als Funktion von Zusammensetzung und Temperatur. Diagramme, der partiellen Dampfdracke sowie des Gesamtdampfdrucks in Abhängigkeit von Zusammensetzung und Temperatur werden angegeben.
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© 1998 Carl Hanser Verlag, München
Articles in the same Issue
- Frontmatter
- Aufsätze
- Kinetics of Phase Separation in a Hypermonotectic Al–Pb Alloy
- Liquid–Liquid Interfacial Tension in the Demixing Metal Systems Ga–Hg and Ga–Pb
- Preparation, Structure and Physical Properties of Fe-, Co- and Ni-rich Melt-quenched Ribbons Containing Zr or Hf – Part IV: Thermal Stability; DSC, TEM and Thermomagnetic Studies
- Fractal Aggregation in MgO-B2O3-SiO2 Slag
- Phase Equilibria of the Decagonal AlCoNi Phase
- Free Energy of Mixing and Vapour Pressure of Liquid Ga-As, In-As, Ga-P and In-P Alloys
- Phase Equilibria in the Dy–Fe–Nd System at 500 °C
- Determination of Stress Gradients by X-ray Diffraction: Comparison of Different Methods and Applications
- Non-Linear Denoising with Wavelet Transformation
- Effect of Cold Working and Annealing on Grain Size and Hardness of a Zr-2.5Nb Alloy
- Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
- Personen
- Buchbesprechungen
- Terminkalender
Articles in the same Issue
- Frontmatter
- Aufsätze
- Kinetics of Phase Separation in a Hypermonotectic Al–Pb Alloy
- Liquid–Liquid Interfacial Tension in the Demixing Metal Systems Ga–Hg and Ga–Pb
- Preparation, Structure and Physical Properties of Fe-, Co- and Ni-rich Melt-quenched Ribbons Containing Zr or Hf – Part IV: Thermal Stability; DSC, TEM and Thermomagnetic Studies
- Fractal Aggregation in MgO-B2O3-SiO2 Slag
- Phase Equilibria of the Decagonal AlCoNi Phase
- Free Energy of Mixing and Vapour Pressure of Liquid Ga-As, In-As, Ga-P and In-P Alloys
- Phase Equilibria in the Dy–Fe–Nd System at 500 °C
- Determination of Stress Gradients by X-ray Diffraction: Comparison of Different Methods and Applications
- Non-Linear Denoising with Wavelet Transformation
- Effect of Cold Working and Annealing on Grain Size and Hardness of a Zr-2.5Nb Alloy
- Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
- Personen
- Buchbesprechungen
- Terminkalender
