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Effect of Atomic Order on Iron and Cobalt Grain Boundary Diffusion in the FeCo Equiatomic Compound

Published online by Cambridge University Press:  10 February 2011

Zs. Tôkei ,
J. Bernardini  and
D. L. Beke
Zs. Tôkei
Affiliation:
Laboratoire de Métallurgie, UMR 6518, Faculté des Sciences Saint Jérôme, 13397 Marseille cedex 20, France. Department of Solid State Physics, L. Kossuth University, P. O. Box 2, 4010 Debrecen, Hungary.
J. Bernardini
Affiliation:
Laboratoire de Métallurgie, UMR 6518, Faculté des Sciences Saint Jérôme, 13397 Marseille cedex 20, France.
D. L. Beke
Affiliation:
Department of Solid State Physics, L. Kossuth University, P. O. Box 2, 4010 Debrecen, Hungary.
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Abstract

Simultaneous grain boundary self-diffusion of iron and cobalt in FeCo was investigated in the B-kinetic regime by the radiotracer method combined with a serial sectioning technique over the temperature range 873-1133 K, which includes the A2-B2 bulk order-disorder transition temperature. This transition leads to a decrease in both iron and cobalt mass transport mainly owing to a change in the pre-exponential factor, but not in the diffusion activation energy. Moreover, the breaking point in the Arrhenius plots is observed below the bulk order-disorder transition temperature. In view of recent surface segregation studies on Fe-Co, and according to the Fe-Co phase diagram, the results are discussed assuming an iron segregation, which decreases the A2-B2 transition temperature in grain boundaries.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 527: Symposium Z – Diffusion Mechanisms in Crystalline Materials , 1998 , 267
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

1. Mehrer, H., Materials Transaction JIM 37 1259 (1996).Google Scholar
2. Kuper, B., Lazarus, D., Manning, J. R. and Tomizuka, C. T., Phys. Rev. 104 1536 (1956).Google Scholar
3. Peterson, L. and Rothman, S. J., Phys. Rev. 154 558 (1967).Google Scholar
4. , Iijima and Lee, C., Acta metall. mater. 43 1183 (1995).Google Scholar
5. Tôkei, Zs., Bernardini, J., Gas, P. and Beke, D. L., Acta mater. 45 541 (1997).Google Scholar
6. Eggersmann, M., Sepiol, B., Voig, G. and Mehrer, H., Defect and Diffusion Forum 143–147 339 (1997).Google Scholar
7. Tôkei, Zs., Bernardini, J., Erdélyi, G., Gôdény, I. and Beke, D. L., Acta mater., in press.Google Scholar
8. Borofin, B., Bulatov, G. S. and Drugova, I. A., Fiz. Met. metalloved. 40 363 (1975).Google Scholar
9. Hoshino, K., Rothman, S. J. and Averback, R. S., Acta Metall. 36 1271 (1988).Google Scholar
10. Frank, St., Schöfdervall, U. and Herzig, Chr., Phys. Stat. Sol (b), 191 45 (1995).Google Scholar
11. Frank, St., Rüsing, J. and Herzig, Chr., Defect and Diffusion Forum 143–147 1441 (1997).Google Scholar
12. Zulina, P., Bolberova, E. V. and Razumovskii, I. M., Defect and Diffusion Forum 143–147 1453 (1997).Google Scholar
13. Barge, T., Gas, P. and d'Heurle, F. M., J. Mater. Res. 10 1134 (1995).Google Scholar
14. Ciccariello, C., Poize, S. and Gas, P., J. Appl. Phys. 67 3315 (1990).Google Scholar
15. Gülpen, J., PhD thesis, Technische Universiteit Eindhoven, 1995.Google Scholar
16. Harrison, G., Trans. Faraday Soc. 57, p. 1,191 (1961).Google Scholar
17. Kaur, I., Mishin, Yu. and Gust, W., in Fundamentals of Grain and Interphase Boundary Diffusion, Third enlarged edition. John Wiley & Sons Ltd., (1995).Google Scholar
18. Suzuoka, T., Trans. Japan Inst. Metals 2 25 (1961).Google Scholar
19. Girifalco, A., J. Phys. Chem. Solids 24 323 (1964).Google Scholar
20. Bakker, H., Stolwijk, N. A., Meij, L. Van der and Zuurendonk, T. J., Nucl. Metall. 20 96 (1976)Google Scholar
21. Tseng, W. F., Marcinkowski, M. J. and Dwarakadasa, E.S., J. Mat. Sc. 9 41 (1974).Google Scholar
22. Krimmel, S., Donner, W., Nickel, B. and Dosch, H., Phys. Rev. Letters 78 3880 (1997).Google Scholar
23. Massalski, B., in Binary Alloy Phase Diagrams. The Materials Soc. 2nd Edition, (1992).Google Scholar
24. Azzaoui, El, Hou, M. and Pontikis, V., Interface Sc. 2 57 (1994).Google Scholar