Modeling segregation and convection during the growth of ternary alloys under terrestrial and microgravity conditions

Jeffrey J. Derby, N. Ponde, V. F. De Almeida, A. Yeckel

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations

Abstract

The growth of large single-crystals of exacting quality presents some of the most difficult challenges in materials processing. Two numerical studies relevant to understanding microgravity crystal growth experiments are presented. Using a 1D finite element (FE) model for transient solidification with a moving boundary coupled with the Stefan-Maxwell equation for species transport, one assesses the validity of a pseudo-binary approximation to describe segregation phenomena during diffusion limited growth of a model ternary alloy. The other uses a simplified FE model for 3D transient fluid flow for Bridgman growth. Initial results from both studies are presented.

Original languageEnglish (US)
Pages (from-to)93-98
Number of pages6
JournalMaterials Science Forum
Volume329
DOIs
StatePublished - 2000
EventProceedings of the 1999 3rd International Conference on Solidification and Gravity - Miskolc, Hung
Duration: Apr 25 1999Apr 28 1999

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