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Talks and Poster Presentations (with Proceedings-Entry):

C. Buchner, W. Schneider:
"Explosive Crystallization in Thin Amorphous Layers on Heat Conducting Substrates";
Poster: 14th International Heat Transfer Conference, Washington, D.C.; 2010-08-08 - 2010-08-13; in: "Proceedings of the International Heat Transfer Conference (IHTC14)", (2010), ISBN: 978-0-7918-3879-2; Paper ID IHTC14-22187, 10 pages.



English abstract:
The self-sustaining process of transformation from an
amorphous state to the crystalline state is considered. The
crystallizing layer, which is mounted on a substrate, is assumed
to be very thin. Thus the energy balance for the layer reduces to
the equation of one-dimensional heat diffusion with a source
term due to the local liberation of latent heat and a heat loss
term due to thermal contact with the substrate. The crystalli-
zation rate is determined by a rate equation based on the
crystallization theory due to A.N. Kolmogorov and M. Avrami.
Heat conduction in the substrate is described by introducing a
continuous distribution of moving heat sources at the interface.
The problem is solved numerically with a collocation method.
The propagation speed of the crystallization wave is obtained
as an eigenvalue. Dual solutions are found below a critical
value of a non-dimensional heat-loss parameter, whereas no
solution exists above that value.

Keywords:
explosive crystallization, heat transfer, integro-differential equations, rate equations, thin film, crystallization kinetics

Created from the Publication Database of the Vienna University of Technology.