Abstract
Interdiffusion coefficient matrices, \(\overline D _{ij}^n \) have been experimentally measured at 31 points in the αδFe phase field of the Fe-Cr-AI ternary equilibrium phase diagram at 900 °C (1173 K). Analyses of the computed matrices were carried out by subjecting each measured -Dn ij to two consistency tests comprised of Onsager’s and Kirkaldy’s relations. Good consistency with these relationships was obtained in the central region of the ternary phase field, but there were significant deviations near the phase boundaries. These may beattributable to systematic uncertainties in the analytical procedure. The results indicate that \(\overline D _{CrCr}^{Fe} \) falls quickly with increasing CCr, with CAl > 0.2, but is not a strong function of CAl. Conversely, \(\overline D _{AlAl}^{Fe} \) is not a strong function of CAl but decreases with increasing CCr.
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formerly with the Lawrence Berkeley Laboratories of the University of California, Berkeley
At the time of this research, Dr. Stringer was on sabbatical leave at the Lawrence Berkeley Laboratories, Department of Materials Science and Mineral Engineering, University of California, Berkeley, CA 94720.
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Akuezue, H.C., Stringer, J. Interdiffusion in ternary Fe-Cr-AI alloys. Metall Trans A 20, 2767–2781 (1989). https://doi.org/10.1007/BF02670169
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DOI: https://doi.org/10.1007/BF02670169