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Effect of temperature gradient on the lamellar structure formation
Author(s) -
Wołczyński Waldemar
Publication year - 1989
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.2170241208
Subject(s) - lamellar structure , eutectic system , temperature gradient , curvature , thermodynamics , growth rate , materials science , field (mathematics) , crystal growth , mechanics , chemistry , physics , crystallography , mathematics , microstructure , geometry , meteorology , pure mathematics
The detailed definition of interplay between interface curvature and concentration field is presented. It explains an effect of horizontal component of temperature gradient on the lamellar structure formation during the steady‐state eutectic growth. This definition is composed of two competitive terms connected with the heat and matter transfers, respectively. The above competition is interpreted by using the thermodynamics of irreversible processes. Finally, it is shown that the lamellar spacing depends on both the growth rate and temperature gradient for a given regular eutectic solidifying under stationary conditions. The proposed analysis is the fourth part of model developing in “Crystal Research and Technology” which is mentioned in the References.