Abstract
The rate of diffusion of Zn into Fe in solid Fe/Zn diffusion couples is found to be two to four orders of magnitude greater than would be predicted by lattice diffusion. The penetration depth varies markedly from sample to sample. It is achieved primarily in an initial transient, and then stops even though a steep concentration gradient persists in the ferrite. The maximum concentration of Zn in the ferrite surface layer often exceeds the published solubility of the first intermetallic phase, gamma, in ferrite. The initial Zn penetration seems to occur by DIGM. The mechanism for continued penetration is less clear. The variability in percent Zn in the ferrite, and possibly the variation in penetration depth, must stem from the delay in the nucleation of the most iron rich intermetallic phase, gamma.
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References
G. V. Kidson:J. Natl. Mal., 1961, vol. 3, p. 21.
Guan-Xing Li and G. W. Powell:Acta Metall., 1985, vol. 33, pp. 23–32.
S.R. Shatynski, J. P. Hirth, and R. A. Rapp:Acta Metall., 1975, vol. 24, p. 1071.
S. Herd, K. N. Tu, and K. Y. Ahn:Appl. Phys. Lett., 1983, vol. 42, pp. 597–99; Thin Solid Films, 1983, vol. 104, p. 197.
R. Schwartz, K. L. Wong, W. L. Johnson, and B.M. Clemens:J. Non-Cryst. Solids, 1984, vol. 61-2, pp. 129–34.
B.M. Clemens, R. Schwartz, and W.L. Johnson:J. Non-Cryst. Solids, 1984, vol. 61-2, pp. 817–22.
K. N. Tu: “Kinetics of Interfacial Reaction in Bimetallic Cu-Sn Thin Films,”Acta Metal., 1982, vol. 30, pp. 947–52.
K. N. Tu, G. Ottaviani, U. Goesele, and H. Foell: “Intermetallic Compound Formation in Thin-film and Bulk Samples of Ni-Si Binary Systems,”J. Appl. Phys., 1982, vol. 53, pp. 3252–60.
J.E.E. Baglin and J.M. Poate:Thin Films—Interdiffusion and Readions, Poate, Tu, and Mayer, eds., Wiley-Interscience Publ., New York, NY, 1978, pp. 305–57.
K. N. Tu, G. Ottaviani, and R. D. Thompson:J. Appl. Phys., 1982, vol. 53, pp. 4406–10.
J. Mackowiak and N.R. Short:Int. Metals Rev., 1979, vol. 24, pp. 1–18.
L.M. Bernick and W. C Sievert:Mechanical Working & Steel Processing IV, D. A. Edgecombe, ed., Metal. Soc. Conf., AIME, 1969, vol. 44, pp. 123–45.
I. Richter and M. Feller-Kniepmeier:Phys. Stat. Sol., 1981, vol. A68, pp. 289–300.
M. Hillert and G. R. Purdy:Acta Metall., 1978, vol. 26, p. 333.
Chongmo Li and M. Hillert:Acta Metall., 1981, vol. 29, pp. 1949–60.
Zong-sen Yu and P.G. Shewmon:Metall. Trans. A, 1982, vol. 13A, pp. 1567–72.
Zong-sen Yu and P. G. Shewmon:Metall. Trans. A, 1983, vol. 14A, pp. 1579–82.
Ortrud Kubaschewski:Iron-Binary Phase Diagrams, Springer-Verlag, Berlin, 1982, p. 173.
G.R. Speich, L. Zwell, and H.A. Wriedt:Trans. AIME, 1964, vol. 230, pp. 939–40.
V. Iyer: unpublished research, The Ohio State Univ., 1985.
Chongmo Li and M. Hillert: “Diffusion Induced G. B. Mig. in Cu-Zn,”Acta Metall., 1982, vol. 30, pp. 1133–45.
F. J. A. Den Broeder:Acta Metall., 1972, vol. 20, p. 319.
J. M. Vandenberg, F. J. A. Den Broeder, and R. A. Hamm:Thin Solid Films, 1982, vol. 93, pp. 277–80.
G. R. Speich:Trans. AIME, 1968, vol. 242, p. 1359.
B. Predel and M. Frebel:Metall., 1973, vol. 27, pp. 460–66.
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He was a Visiting Scholar at OSU at the time this work was done.
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Shewmon, P., Abbas, M. & Meyrick, G. Anomalously fast diffusion in the Fe-Zn System. Metall Trans A 17, 1523–1527 (1986). https://doi.org/10.1007/BF02650088
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DOI: https://doi.org/10.1007/BF02650088