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Microdynamic Mechanisms of Crystal Growth Under Applied Electric Fields

Published online by Cambridge University Press:  15 February 2011

Y.N. Jiao ,
S. Takamori ,
Y. Ohsawa ,
G. Arakane  and
A. Sato
Y.N. Jiao
Affiliation:
Materials Creation Station, National Research Institute for Metals, 1-2-1, Sengen, Tsukuba, Ibaraki 305-0047, JAPAN, [email protected]
S. Takamori
Affiliation:
Materials Creation Station, National Research Institute for Metals, 1-2-1, Sengen, Tsukuba, Ibaraki 305-0047, JAPAN, [email protected]
Y. Ohsawa
Affiliation:
Materials Creation Station, National Research Institute for Metals, 1-2-1, Sengen, Tsukuba, Ibaraki 305-0047, JAPAN, [email protected]
G. Arakane
Affiliation:
Materials Creation Station, National Research Institute for Metals, 1-2-1, Sengen, Tsukuba, Ibaraki 305-0047, JAPAN, [email protected]
A. Sato
Affiliation:
Materials Creation Station, National Research Institute for Metals, 1-2-1, Sengen, Tsukuba, Ibaraki 305-0047, JAPAN, [email protected]
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Abstract

On the basis of the model of atomic cluster jump theory, a microdynamical model of crystal growth rate was developed under an electric field. Theoretical analysis indicates that the crystal growth rate is dependent on not only the nature of the metal, the undercooling and so on but also the applied electric fields. Moreover, a novel model, which shows the effect of an applied electric field on the solute distribution, the constitutional undercooling and the temperature distribution at solid/liquid interface during unidirectional solidification, has been established theoretically. Analytical results show that the electrotransport of solute strongly influences the solute distribution and then changes the constitutional undercooling and the temperature distribution. But all changes are connected with the electric current direction of the applied electric field (positive or negative).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 580: Symposium E – Nucleation & Growth Processes in Materials , 1999 , 333
Copyright
Copyright © Materials Research Society 2000

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References

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