Heat of mixing and morphological stability

P. Nandapurkar, D. R. Poirier

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A mathematical model, which incorporates heat of mixing in the energy balance, has been developed to analyze the morphological stability of a planar solid-liquid interface during the directional solidification of a binary alloy. It is observed that the stability behavior is almost that predicted by the analysis of Mullins and Sekerka at low growth velocities while deviations in the critical concentration of about 20-25% are observed under rapid solidification conditions for certain systems. Our calculations indicate that a positive heat of mixing makes the planar interface more unstable, whereas a negative heat of mixing makes it more stable, in terms of the critical concentration.

Original languageEnglish (US)
Pages (from-to)88-96
Number of pages9
JournalJournal of Crystal Growth
Volume92
Issue number1-2
DOIs
StatePublished - Oct 1 1988

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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