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Effect of Buoyancy‐driven Convection on Lamellar Spacing of an AlZn Eutectic
Author(s) -
Tuček V.,
Holeček S.,
Kubiček L.,
Barta Č.
Publication year - 1986
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170211024
Subject(s) - eutectic system , buoyancy , lamellar structure , convection , materials science , crystallization , marangoni effect , thermodynamics , mechanics , metallurgy , microstructure , physics
The influence of buoyancy‐driven convection on the lamellar spacing of an Al–Zn eutectic was studied under conditions of oriented crystallization. The convection due to buoyancy was affected by the mold position respective to the direction of action of the force of gravity. It has been found that the buoyancy‐driven convection does not exert any direct effect on the lamellar spacing. Rather, it only affects the rate of advance of the crystallization front. The lamellar spacing λ of the Al–Zn eutectic can be described as function of this rate of advance V by the relation\documentclass{article}\pagestyle{empty}\begin{document}$$ \lambda = {\rm V}^{ - 0.46} .9.0 $$\end{document} .