Confinement effects in dendritic growth
Confinement effects in dendritic growth
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树突生长的限制效应
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
K. Kassner
中科院分区：
文献类型：
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作者：
H. Emmerich;D. Schleussner;T. Ihle;K. Kassner
我们研究了扩散限制生长中晶体取向和约束之间的相互作用。多位作者已经详细研究了在最小表面硬度方向上的总体形态的生长，Brener等人总结了最新进展（Brener E，Muller-Krumbhaar H和Temkin D 1996 Phys.Rev.E54 2714）。在这里，我们考虑竞争的影响，每一个试图强加一个不同的增长方向。引起这种竞争的最简单的可能情况是在通道壁的取向和表面张力各向异性之间不匹配的通道中生长。分析这种情况，我们发现了一个新的结构，并获得进一步的洞察形态稳定性的问题。另一种情况是周期性边界条件，其中相同的取向差角可以用来描述指形晶体的倾斜阵列的生长。结果表明，倾斜对枝晶和双晶结构之间的转变有影响。
We study the interplay between crystal orientation and confinement in diffusion-limited growth. Growth of the overall morphology in the direction of minimal surface stiffness has been investigated in some detail by various authors, the most recent advances being summarized by Brener et al (Brener E, Muller-Krumbhaar H and Temkin D 1996 Phys. Rev. E 54 2714). Here, we consider competing influences, each trying to impose a different growth direction. The simplest possible situation giving rise to such a competition is growth in a channel with a mismatch between the orientation of the channel walls and surface tension anisotropy. Analysing this situation, we find a new structure and gain further insight into the problem of morphological stability. Another case is that of periodic boundary conditions, where the same angle of misorientation can be used to describe growth of a tilted array of finger-shaped crystals. It is found that the transition between dendritic and doublonic structures is affected by the tilt.