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MORPHOLOGICAL INSTABILITY IN RAPID DIRECTIONAL SOLIDIFICATION

DU JIA-LING

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MORPHOLOGICAL INSTABILITY IN RAPID DIRECTIONAL SOLIDIFICATION

DU JIA-LING
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(PLEASE TRANSLATE TO ENGLISH

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  • By allowing the segregation coefficient and interface temperature to depend on interface speed in a thermodynamically-consistent way, the non-equilibrium effects are incorporated into a linear stability analysis of planar front. The absolute stability limit of the cellular mode is modified. A new oscillatory instability is found, which leads to the formation of solute bands in the solid, and its absolute-stability limit is determined by solute trapping and kinetics. The results of this theory are in agreement with observations.
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  • Abstract views:  5864
  • PDF Downloads:  394
  • Cited By: 0
Publishing process
  • Received Date:  05 October 1998
  • Accepted Date:  13 November 1998
  • Published Online:  05 April 1999

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