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 language | English (US) |
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Pages (from-to) | 88-96 |
Number of pages | 9 |
Journal | Journal of Crystal Growth |
Volume | 92 |
Issue number | 1-2 |
DOIs | |
State | Published - Oct 1 1988 |
ASJC Scopus subject areas
- Condensed Matter Physics
- Inorganic Chemistry
- Materials Chemistry