Premium
Contribution to the stability analysis of the dewetted Bridgman growth under microgravity conditions
Author(s) -
Bizet L.,
Duffar T.
Publication year - 2004
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.200310216
Subject(s) - dewetting , crucible (geodemography) , stability (learning theory) , mechanics , thermal stability , heat transfer , boundary (topology) , thermodynamics , materials science , chemistry , nanotechnology , physics , mathematics , computer science , mathematical analysis , thin film , computational chemistry , organic chemistry , machine learning
Experimental observations show that the gap between the sample and the crucible, commonly obtained after solidification in microgravity, is remarkably stable. With the aim to understand the reason of this stability, the dewetting phenomenon is studied by Lyapunov's method. After a short review of the existing mechanisms leading to dewetting, the open smooth crucible configuration is chosen as the most representative. The analytical stability analysis, taking into account geometrical and thermal effects, performed under some boundary heat transfer approximations, shows that, in most cases, the dewetting process is intrinsically stable. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)