Results 311 to 320 of about 30,563 (351)

Shape of growth cells in directional solidification

Physical Review E, 2006
The purpose of this study is to characterize experimentally the whole shape of the growth cells displayed in directional solidification and its evolution with respect to control parameters. A library of cells is first built up from observation of directional solidification of a succinonitrile alloy in a large range of pulling velocity, cell spacing ...
Pocheau, Alain, Georgelin, Marc
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A method for flattening the solidification front in directional solidification technology

Journal of Crystal Growth, 2015
Abstract Nonplanar solidification front causes defects in directional solidification process. The transverse temperature gradient, which can be divided into radial temperature gradient and circumferential temperature gradient, is one of the reasons causing the nonplanar solidification front.
Yuanyuan Lian, Dichen Li, Kai Zhang
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Growth directions of microstructures in directional solidification of crystalline materials

Physical Review E, 2008
In directional solidification, as the solidification velocity increases, the growth direction of cells or dendrites rotates from the direction of the thermal gradient to that of a preferred cristalline orientation. Meanwhile, their morphology varies with important implications for microsegregation. Here, we experimentally document the growth directions
Deschamps, Julien, Georgelin, Marc, Pocheau, Alain   +2 more
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Pattern Formation in Directional Solidification

MRS Proceedings, 2003
We simulate directional solidification using the phase field method solved with adaptive mesh refinement. We examine length scale selection for two cases. For small surface tension anisotropy directed at forty five degrees relative to the pulling direction, we observe a transition from a seaweed to dendrite morphology as the thermal gradient is lowered,
Mike Greenwood, Mikko Haataja, Nikolas Provatas   +2 more
openaire   +1 more source

Modelling of directional solidification of BSO

Journal of Crystal Growth, 1993
A thermo-fluid model for vertical Bridgman growth of bismuth silicon oxide (BSO) as model material for semi-transparent, low thermal conductivity oxides is developed. Internal radiative heat transfer, together with convective and conductive heat transfer are considered in this model. Due to the strong internal thermal radiation within the grown crystal,
Chenting Lin, Shahryar Motakef
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Kinetic Effects in Directional Solidification

Applied Mechanics Reviews, 1990
Mullins and Sekerka showed for fixed temperature gradient that the planar interface is linearly stable for all pulling speeds V above some critical value, the absolute stability limit. Near this limit, where solidification rates are rapid, the assumption of local equilibrium at the interface may be violated. We incorporate nonequilibrium effects into a
G. J. Merchant, S. H. Davis
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Directional Solidification

2023
Li Shuangming, Xu Kuangdi
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Patterns in Directional Solidification

1990
There have recently been a set of new phenomena observed in the directional solidification of liquid crystals, including travelling waves and spatial period doubling. We apply the integro-differential method to the liquid crystal system of Simon et.al. and show that we can reproduce the period doubling state.
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Absence of Selection in Directional Solidification

Physical Review Letters, 1988
Ben Amar, Martine, Moussallam, B.
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Faceting in directional solidification

Physical Review A, 1991
, Adda Bedia M, , Ben Amar M
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