Spatial period-doubling instability of dendritic arrays in directional solidification

被引：35

作者：

Losert, W ^{[1
]}

Shi, BQ ^{[1
]}

Cummins, HZ ^{[1
]}

Warren, JA ^{[1
]}

机构：

[1] NIST,MAT SCI & ENGN LAB,DIV MET,GAITHERSBURG,MD 20899

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.77.889

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A directional solidification study of succinonitrile doped with coumarin 152 was performed in which the pulling speed V-P was gradually reduced in small steps. A spatial period-doubling instability was observed when V-P reached 17.4 mu m/s, in good quantitative agreement with the prediction of Warren and Langer [Phys. Rev. A 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(1).

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页码：889 / 891

页数：3

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