Spatiotemporal chaos near the onset of cellular growth during thin-film solidification of a binary alloy
Thin-film solidification experiments with a succinonitrile-acetone alloy are used to observe the long time-scale dynamics of cellular crystal growth at growth rates only slightly above the critical value V = V cλ c for the onset of morphological instability Under these conditions only very small amp...
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Published in | Journal of crystal growth Vol. 121; no. 3; pp. 536 - 542 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Legacy CDMS
Elsevier B.V
01.07.1992
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Thin-film solidification experiments with a succinonitrile-acetone alloy are used to observe the long time-scale dynamics of cellular crystal growth at growth rates only slightly above the critical value
V =
V
cλ
c for the onset of morphological instability Under these conditions only very small amplitude cells are observed with wavelengths near the value predicted by linear stability theory λ = λ
c. At long times, microstructures with wavelengths significantly finer than λ
c form by nucleation at defects across the interface. These interfaces do not have a unique microstructure, but seem to exhibit spatiotemporal chaos on a long time scale caused by the continual birth and death of cells by tip splitting and cell annihilation in grooves. |
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Bibliography: | CDMS Legacy CDMS ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0022-0248 1873-5002 |
DOI: | 10.1016/0022-0248(92)90168-I |