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Kinetic paths of B2 and DO3 order parameters: Experiment

Published online by Cambridge University Press:  31 January 2011

L. Anthony  and
B. Fultz
L. Anthony
Affiliation:
Department of Materials Science 138-78. California Institute of Technology, Pasadena, California 91125
B. Fultz
Affiliation:
Department of Materials Science 138-78. California Institute of Technology, Pasadena, California 91125
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Abstract

Rapidly quenched powders of Fe3Al were subjected to thermal annealings at temperatures well below the critical temperatures for B2 and DO3 ordering. X-ray diffractometry was used to measure the subsequent evolution of B2 and DO3 long-range order. It was found that the relative rates of change of B2 and DO3 order parameters were temperature dependent; hence at different temperatures the alloy passed through different states of order en route to thermal equilibrium. These temperature dependences of “kinetic paths” can be understood in terms of a theory of kinetic paths based on the kinetic master equation. The theory indicates that the temperature dependence of the observed kinetic paths originates from having first-nearest-neighbor interactions that are stronger than second-nearest-neighbor interactions. This seems consistent with previous thermodynamic analyses of critical temperatures of Fe3Al.

Type
Articles
Information
Journal of Materials Research , Volume 4 , Issue 5 , October 1989 , pp. 1140 - 1142
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

1Kubaschewski, O.Iron-Binary Phase Diagrams (Springer-Verlag, New York, 1982).Google Scholar
2Binary Alloy Phase Diagrams, edited by Massalski, T. B. (ASM, Metals Park, OH, 1986).Google Scholar
3Swann, P. R.Duff, W. R. and Fisher, R. M.Metall. Trans. 3, 409 (1972).Google Scholar
4Oki, K.Hasaka, M. and Eguchi, T.Jpn. J. Appl. Phys. 12, 1522 (1973).CrossRefGoogle Scholar
5Allen, S. M. and Cahn, J. W.Ada Metall. 24, 425 (1976).CrossRefGoogle Scholar
6Allen, S. M.Phil. Mag. 36, 182 (1977).CrossRefGoogle Scholar
7Oki, K.Hasaka, M. and Eguchi, T.Trans. JIM 15, 143 (1974).CrossRefGoogle Scholar
8Anthony, L. and Fultz, B.J. Mater. Res. 4, 1132 (1989).Google Scholar
9Rudman, P. S.Ada Metall. 8, 321 (1960).CrossRefGoogle Scholar
10Khachaturyan, A.G.Theory of Structural Transformations in Solids (Wiley, New York, 1983), Sec. 3.10.Google Scholar
11Rietveld, H.M.Ada Cryst. 20, 508 (1966); R. B. Von Dreele, J.D. Jorgensen, and C. G., Windsor J. Appl. Cryst. 15, 581 (1982).CrossRefGoogle Scholar