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The Planar to Cellular Transition and the Long Time Scale Dynamics of Pattern Formation During Thin-Film Directional Solidification

Published online by Cambridge University Press:  26 February 2011

John T.C. Lee  and
Robert A. Brown
John T.C. Lee
Affiliation:
Massachusetts Institute of Technology, Department of Chemical Engineering, Cambridge, MA 02139
Robert A. Brown
Affiliation:
Massachusetts Institute of Technology, Department of Chemical Engineering, Cambridge, MA 02139
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Abstract

Experimental observations of the melt/crystal interface in the directional solidification of a thin sample of a binary alloy are reported for conditions only slightly beyond those for the onset of morphological instability. Spectral analysis for long times shows dynamics leading to a band of most probable wavelengths with sharply selected peaks at wavelengths significantly below the most dangerous wavelength predicted by linear stability theory. These large-amplitude cells develop first in packets that spread to fill the interface.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 205: Symposium F – Kinetics of Phase Transformations , 1990 , 319
Copyright
Copyright © Materials Research Society 1992

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References

1. Mullins, W.W. and Sekerka, R.F., J. Appl. Phys., 35, 444 (1964).Google Scholar
2. Ungar, L.H. and Brown, R.A., Phys. Rev, B29, 1367 (1984).CrossRefGoogle Scholar
3. Ungar, L.H. and Brown, R.A., Phys. Rev., B31 5931 (1985).Google Scholar
4. Ramprasad, N., Bennett, M.J. and Brown, R.A., Phys. Rev., B38, 583 (1988).Google Scholar
5. Bennett, M.J. and Brown, R.A., Phys. Rev., B39, 11705 (1989).Google Scholar
6. Bennett, M.J. and Brown, R.A., in preparation (1990).Google Scholar
7. Eshelman, M.A. and Trivedi, R., Acta Metall., 35, 2443 (1987).Google Scholar
8. Eshelman, M.A., Seetharaman, V. and Trivedi, R., Acta Metall., 3, 1165 (1988).Google Scholar
9. Cheveigne, S. De, Guthmann, C., Kurowski, P., Vicente, E. and Biloni, H., J. Crystal Growth, 22, 616 (1988).Google Scholar
10. Schaefer, R.J., Glicksman, M.E. and Ayers, J.D., Phil. Mag., 32, 725 (1975).Google Scholar
11. Glicksman, M.E., Schaefer, R.J. and Ayers, J.D., Metall. Trans. 35, 1747 (1976).Google Scholar
12. Lee, T.C., Ph.D. Thesis. Massachusetts Institute of Technology, 1991.Google Scholar
13. Lee, T.C. and Brown, R.A., in preparation (1991).Google Scholar
14. Cheviegne, S. de, Guthmann, C., and Lebrun, M.M., J. Crystal Growth, 71, 242 (1985).CrossRefGoogle Scholar