Results 211 to 220 of about 290,007 (262)
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Impurity effect on dendritic growth
Physical Review A, 1989We consider the effects of impurities on the velocity selection of a needle crystal, in the small thermal and solutal Peclet numbers. As in the case of the growth in a pure melt, steady solutions for needle crystals are found only if surface tension is anisotropic.
, Ben Amar M, , Pelcé
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Dendritic growth of ZnS crystals
Acta Physica Academiae Scientiarum Hungaricae, 1965The dendritic growth of ZnS crystals in the form of long ribbons, plates and needles was observed when ZnS crystallized from liquid Ga. The cubic ribbons and plates propagated in the directions, the needles were hexagonal and their main propagation was parallel to the c-axis.
I. Bertóti +4 more
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Cellular and dendritic growth. II
Journal of Crystal Growth, 1974Abstract A theoretical model is developed to explain the variation in cellular or dendritic tip temperatures with velocity and temperature gradient. It is shown that the undercooling can be considered to arise as a result of build up of average solute concentration ahead of the growth front depending mainly on the imposed temperature gradient ...
M.H. Burden, J.D. Hunt
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Effect of a forced flow on dendritic growth
Physical Review A, 1989The effects of a forced flow on dendritic growth rate are studied theoretically. By using a solvability condition one determines the eigenvalue C = p2V/Dd0 as a function of the velocity of the forced flow in the two-dimensional model. The results are compared critically with recent experiments.
, Bouissou, , Pelcé
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The growth of dendrites in the mammalian brain
Zeitschrift f�r Anatomie und Entwicklungsgeschichte, 1969The histological features of developing dendrites are analyzed in age-graded series of cats, rats, rabbits, and opossums with the Golgi techniques. Growth cones and filopodia are consistent features of growing dendrites in the sensory nuclei, motor cranial nerve nuclei, brain stem reticular formation, cerebellar cortex, midbrain tectum, thalamus ...
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2002
Many of the alloys used in practice, such as steel, aluminum-copper alloys, nickel-base and copper-base alloys, are single phase alloys, which means that the final product of solidification is a solid solution. Depending on the thermal and compositional field, cellular or, in most practical cases, dendritic morphology will occur.
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Many of the alloys used in practice, such as steel, aluminum-copper alloys, nickel-base and copper-base alloys, are single phase alloys, which means that the final product of solidification is a solid solution. Depending on the thermal and compositional field, cellular or, in most practical cases, dendritic morphology will occur.
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Canadian Journal of Physics, 1951
Dendritic growth of large single crystals of lead is revealed by decanting the remaining liquid at any required stage of the process of solidification. The direction of dendritic growth was determined as a function of crystallographic orientation and direction of solidification.
F. Weinberg, Bruce Chalmers
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Dendritic growth of large single crystals of lead is revealed by decanting the remaining liquid at any required stage of the process of solidification. The direction of dendritic growth was determined as a function of crystallographic orientation and direction of solidification.
F. Weinberg, Bruce Chalmers
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Nucleation and Dendritic Growth in Undercooled Melts
MRS Proceedings, 1995ABSTRACTTechniques of containerless processing are applied to undercool and solidify metals and alloys. These techniques allow direct measurements of both the undercooling and the crystal growth velocity. Experimental results are presented for studies of nucleation of metastable crystalline phases and quasicrystals.
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Electrolytic Growth of Silver Dendrites
Science, 1964The growth rates of silver dendrites formed in narrow capillaries by electrodeposition under various physical conditions have been determined. Dissolution of such dendrites as well as their growth can be reliably controlled. This principle may be used in the design of components for adaptive electronic systems.
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Dendritic and spheroidal growth
Acta Metallurgica, 1961Exact solutions to the diffusion equation are obtained which correspond to diffusion controlled growth of elliptical paraboloids (dendrites; forward growth with linear time dependence) and spheroids (growth with square root of time dependence). The elliptical dendrite includes as special cases the dendrite of circular cross-section and the dendrite ...
G Horvay, J.W Cahn
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