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Experimental investigation and thermodynamic modeling of the Au–Ge–Ni system

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Abstract

Phase equilibria in the Au–Ge–Ni ternary system were studied by means of scanning electron microscopy, electron probe microanalysis, X-ray diffraction, and differential scanning calorimetry. The phase relations in the solid state at 600 °C as well as a vertical section at Au72Ge28–Ni were established. No ternary compound was found at 600 °C. On the basis of the experimental phase equilibria data, a thermodynamic model of the Au–Ge–Ni ternary system was developed using the CALPHAD method. Thermodynamically calculated phase diagrams are shown at 600 °C, in two vertical sections and the liquidus projection. Reasonable agreement between the calculations and the experimental results was achieved.

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Acknowledgments

This work was financially supported by the Swiss State Secretariat for Education and Research (SBF No. C08.0031) within the European COST action MP0602 on high temperature lead-free solder materials as well as by the Swiss National Science Foundation (SNSF no. 200021_134575/1).

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Authors and Affiliations

  1. Laboratory for Joining Technologies and Corrosion, Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600, Dübendorf, Switzerland

    Shan Jin, Liliana I. Duarte & Christian Leinenbach

  2. Computational Materials Laboratory, Ecole Polytechnique Fédérale de Lausanne, Station 12, 1015, Lausanne, Switzerland

    Shan Jin

  3. School of Material Science and Engineering, Central South University, Changsha, 410083, Hunan, People’s Republic of China

    Guoxing Huang

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  1. Shan Jin
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  2. Liliana I. Duarte
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  3. Guoxing Huang
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  4. Christian Leinenbach
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Corresponding author

Correspondence to Christian Leinenbach.

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Dedicated to Professor Herbert Ipser on the occasion of his 65th birthday.

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Jin, S., Duarte, L.I., Huang, G. et al. Experimental investigation and thermodynamic modeling of the Au–Ge–Ni system. Monatsh Chem 143, 1263–1274 (2012). https://doi.org/10.1007/s00706-012-0772-y

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  • DOI: https://doi.org/10.1007/s00706-012-0772-y

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