Shear stabilization of morphological instability during directional solidification

T. P. Schulze, S. H. Davis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

A linear stability analysis is performed on the interface formed during the directional solidification of a dilute binary alloy in the presence of a time-periodic flow. In general, the flow is generated by translating the crystal relative to the far-field flow in elliptical orbits parallel to the interface. The presence of this complex, unsteady flow can either stabilize or destabilize the system relative to the case without flow, with the result depending on the frequency and amplitude of the oscillations as well as the properties of the material. We find, however, that proper selection of the frequency and amplitude of the modulation, both physically realizable, can eliminate the possibility of morphological instability for a significant range of solute concentrations.

Original languageEnglish (US)
Pages (from-to)253-265
Number of pages13
JournalJournal of Crystal Growth
Volume149
Issue number3-4
DOIs
StatePublished - Apr 2 1995

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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