Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9830137 | Journal of Crystal Growth | 2005 | 10 Pages |
Abstract
The numerical modeling shows that the sharp increase of g-jitters accelerations 90Â min after the start of the growth process, produces an increase of the convective intensity, which mixes the melt and increases the solidification temperature so that the interface jumps forward. The associated morphological destabilization of the interface is experimentally observed on the etched sample and on the longitudinal profile of solute concentration measured in the crystal. After a chemical homogenization of the melt, the controlled growth is started again with an axial concentration profile, corresponding to a Scheil's law.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Carmen Stelian, Thierry Duffar,