期刊
JOURNAL OF CRYSTAL GROWTH
卷 234, 期 4, 页码 740-750出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0022-0248(01)01680-3
关键词
dendrites; solidification; growth from melt; organic compounds
Dendrite array adjustments have been measured in transparent material during the transient conditions attending deceleration. There is considerable hysteresis between the responses of dendrite tip radii and primary spacings to velocity changes and this promotes the dissolution of the necked regions, where side arms attach themselves to primary stems. Simple analyses of the transient dendritic dimensions are offered to illustrate a detachment mechanism. This phenomenon is relevant to the development of an equiaxed zone in metal castings. (C) 2002 Elsevier Science B.V. All rights reserved.
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