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| Simulation of Effect of Crucible Rotation Parameter on Single Crystal Solute Segregation |
| LIU Juncheng |
| School of Materials Science and Engineering; Shandong University of Technology; Zibo 255091 |
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Cite this article:
LIU Juncheng. Simulation of Effect of Crucible Rotation Parameter on Single Crystal Solute Segregation. Acta Metall Sin, 2004, 40(9): 987-994 .
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Abstract A numerical simulation was carried out for Cd0.96Zn0.04Te
crystal growth using vertical
Bridgman method (VBM). Effects wave parameters
of the accelerated crucible rotation technique (ACRT)
on the solid-liquid interface concavity and the solute
segregation were investigated. The results show that for the four
kinds of wave parameters, the ACRT results in an uniform solute
concentration field in the melt in the front of the solid-liquid
interface. However, ACRT wave parameter has crucial
effects on both the solid-liquid interface shape and the solute
segregation in the crystal. With a suitable
wave parameter, the ACRT can make the solid-liquid
interface concavity increase a little, or even not increase,
and decrease the radial solute segregation in the single
crystal extraordinarily, even to be equal to
zero. On the contrary, with an unsuitable wave parameter
the ACRT can make the solid-liquid
interface concavity increase in a great deal, even up
to six times, and increase the radial solute segregation
significantly. Moreover, the ACRT increases the axial
solute segregation apparently with all
the four kinds of wave parameters mentioned in this paper.
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Received: 10 October 2003
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