PHASE DYNAMICS IN DIRECTIONAL SOLIDIFICATION

被引:29
作者
BRATTKUS, K [1 ]
MISBAH, C [1 ]
机构
[1] FORSCHUNGSZENTRUM,INST FESTKORPERFORSCH,JULICH,GERMANY
关键词
D O I
10.1103/PhysRevLett.64.1935
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A phase diffusion equation valid at arbitrary distances above the Mullins-Sekerka threshold is derived from the front integral equation. The steady-state solutions and the associated adjoint functions are computed numerically. As a first exploitation of the phase equation we determine the range of the phase-stable band of steady solutions. Even very close to threshold we find a strong deviation from the Landau-Ginzburg theory. Far from threshold we find that the wavelength Eck on the long-wavelength edge of the Eckhaus band scales with the growth velocity V as V-1/2, as does the experimentally observed wavelength. © 1990 The American Physical Society.
引用
收藏
页码:1935 / 1938
页数:4
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