Experimental investigation and thermodynamic assessment of phase equilibria in the Ag-Au-Sn system

F. Gao; C. P. Wang; Y. Y. Li; X. J. Liu; Y. Takaku; I. Ohnuma; K. Ishida

doi:10.1007/s11664-009-0859-3

Experimental investigation and thermodynamic assessment of phase equilibria in the Ag-Au-Sn system

F. Gao, C. P. Wang, Y. Y. Li, X. J. Liu, Y. Takaku, I. Ohnuma, K. Ishida

ENG - Metallurgy

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The phase equilibria of the Ag-Au-Sn ternary system at 300°C, 400°C, and 500°C were experimentally investigated. The equilibrium compositions of the equilibrated alloys and diffusion couples between Ag _x Au _1-x (x = 0.25, 0.75) alloys and liquid Sn were determined by electron probe microanalysis (EPMA). The phase transformations were investigated by means of differential scanning calorimetry (DSC). Based on the experimental data of phase equilibria and thermodynamic properties, the thermodynamic assessment of the Ag-Au-Sn system was carried out based on the calculation of phase diagrams (CALPHAD) method. The thermodynamic parameters for describing the Gibbs free energies of the phases were optimized, and reasonable agreement between the calculations and experimental data was obtained.

Original language	English
Pages (from-to)	2096-2105
Number of pages	10
Journal	Journal of Electronic Materials
Volume	38
Issue number	10
DOIs	https://doi.org/10.1007/s11664-009-0859-3
Publication status	Published - 2009 Oct

Keywords

CALPHAD method
Pb-free solders
Sn-Ag-Au system

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Materials Chemistry

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abstract = "The phase equilibria of the Ag-Au-Sn ternary system at 300°C, 400°C, and 500°C were experimentally investigated. The equilibrium compositions of the equilibrated alloys and diffusion couples between Ag x Au 1-x (x = 0.25, 0.75) alloys and liquid Sn were determined by electron probe microanalysis (EPMA). The phase transformations were investigated by means of differential scanning calorimetry (DSC). Based on the experimental data of phase equilibria and thermodynamic properties, the thermodynamic assessment of the Ag-Au-Sn system was carried out based on the calculation of phase diagrams (CALPHAD) method. The thermodynamic parameters for describing the Gibbs free energies of the phases were optimized, and reasonable agreement between the calculations and experimental data was obtained.",

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AU - Gao, F.

AU - Wang, C. P.

AU - Li, Y. Y.

AU - Liu, X. J.

AU - Takaku, Y.

AU - Ohnuma, I.

AU - Ishida, K.

PY - 2009/10

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N2 - The phase equilibria of the Ag-Au-Sn ternary system at 300°C, 400°C, and 500°C were experimentally investigated. The equilibrium compositions of the equilibrated alloys and diffusion couples between Ag x Au 1-x (x = 0.25, 0.75) alloys and liquid Sn were determined by electron probe microanalysis (EPMA). The phase transformations were investigated by means of differential scanning calorimetry (DSC). Based on the experimental data of phase equilibria and thermodynamic properties, the thermodynamic assessment of the Ag-Au-Sn system was carried out based on the calculation of phase diagrams (CALPHAD) method. The thermodynamic parameters for describing the Gibbs free energies of the phases were optimized, and reasonable agreement between the calculations and experimental data was obtained.

AB - The phase equilibria of the Ag-Au-Sn ternary system at 300°C, 400°C, and 500°C were experimentally investigated. The equilibrium compositions of the equilibrated alloys and diffusion couples between Ag x Au 1-x (x = 0.25, 0.75) alloys and liquid Sn were determined by electron probe microanalysis (EPMA). The phase transformations were investigated by means of differential scanning calorimetry (DSC). Based on the experimental data of phase equilibria and thermodynamic properties, the thermodynamic assessment of the Ag-Au-Sn system was carried out based on the calculation of phase diagrams (CALPHAD) method. The thermodynamic parameters for describing the Gibbs free energies of the phases were optimized, and reasonable agreement between the calculations and experimental data was obtained.

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