A linear model which predicts Kirkendall marker movement in multicomponent diffusion couples has been tested with a series of Ni-Cr-Al γ-phase alloys. The test results followed the model to within experimental scatter, even though the model assumes constant diffusivity in the reaction zone. Comparing the model predictions with previous work suggests that the model can be used in alloy design to eliminate Kirkendall porosity. In addition, preliminary results suggest that the coefficients of the model can be predicted with useful accuracy from fundamental diffusion data.
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Department of metallurgy and Institute of Materials Science, the University of Connecticut, U-136, Rm. 111, 97 N. Eagleville Rd., 06269-3136, Storrs, CT
Yoon-Ho Son (Graduate Assistant) & J. E. Morral (Professor)
Son, YH., Morral, J.E. The effect of composition on marker movement and kirkendall porosity in ternary alloys. Metall Trans A 20, 2299–2303 (1989). https://doi.org/10.1007/BF02666665
Received: 24 January 1989
Issue Date: November 1989
DOI: https://doi.org/10.1007/BF02666665
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