C.-B. Du, S.-P. Huang, Q.-H. Min, Y.-L. Liu, S.-Y. Wen – Letter to Editor

Interdiffusion coefficient and atomic mobility for fcc Ag-Cu-Mg phase at 1073 K

J. Min. Metall. Sect. B-Metall., 58 (3) (2022) 501-506. DOI:10.2298/JMMB220926029D
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Available online 08 November 2022
(Received 26 September 2022; Accepted 14 October 2022)


In this work, the interdiffusion coefficient and atomic mobility for the fcc Ag-Cu-Mg phase at 1073 K were investigated by combining diffusion couple experiments and calculations. Based on the experimental composition profiles, the diffusion coefficients at the intersections of the diffusion paths were calculated using the Matano-Kirkaldy method. Using the thermodynamic descriptions available in the literature, the atomic mobilities for the fcc Ag-Cu-Mg phase were automatically optimized by numerical inverse method integrated with the CALTPP (CALculation of ThermoPhysical Properties) program. Moreover, the obtained atomic mobilities were confirmed to be reliable by good agreements between the model-simulated and the measuredcomposition profiles. In addition, three-dimensional surfaces were presented for the interdiffusion coefficient, activation energy, and frequency factor. The presently obtained atomic mobilities can be incorporated into the diffusion database for Ag-based alloys, which can contribute to microstructure simulation and material design.

Keywords: fcc Ag-Cu-Mg; interdiffusion coefficient; atomic mobility; CALTPP; activation energy; frequency factor

Correspondence Address:
S.-Y. Wen,
b State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, China;
email: 82543566@qq.com



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