Spatial Period-Doubling Instability of Dendritic Arrays in Directional Solidification

Journal Article · Mon Jul 01 00:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.889· OSTI ID:286775

Losert, W; Shi, B Q; Cummins, H Z ^[1]; Warren, J A ^[2]

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1. Department of Physics, City College of the City University of New York, New York, New York 10031 (United States)
2. Metallurgy Division, Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)

A directional solidification study of succinonitrile doped with coumarin 152 was performed in which the pulling speed {ital V}{sub {ital P}} was gradually reduced in small steps. A spatial period-doubling instability was observed when {ital V}{sub {ital P}} reached 17.4 {mu}m/s, in good quantitative agreement with the prediction of Warren and Langer [Phys. Rev. A {bold 42}, 3518 (1990)]. This experiment, in conjunction with two previous studies, conclusively demonstrates the absence of a dynamical selection mechanism for the interdendritic spacing {lambda}{sub 1}. {copyright} {ital 1996 The American Physical Society.}

• DOE Contract Number: FG02-84ER45132
• OSTI ID: 286775
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 5 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL GROWTH
DENDRITES
INSTABILITY
NITRILES
SOLIDIFICATION
SUCCINIC ACID