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Nucleation Phenomena in Transitions from two to three phases, diffusion Couples, Phase Stability,the thin film formation of some silicides

Published online by Cambridge University Press:  22 February 2011

F. M. D»Heurle
F. M. D»Heurle*
Affiliation:
IBM Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, NY 10598; Institutet for Mikrovagsteknik, S-100 44 Stockholm, Sweden
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Extended abstract

Nucleation is generally understood to refer to the initial process of creating a new phase, for example, liquid water, from another phase, water vapor, as a result of a temperature excursion which carries the system through some critical temperature (in the case at hand, at normal atmospheric pressure, 100°C). The processes involved in such transformations have been the object of careful observations for a long time, at least two centuries; a very good historical perspective on this subject is found at the beginning of Ref. 1. The special case of metal vapors condensing on substrates in order to form thin films is considered in all texts dealing with thin film preparation [2]. The precipitation of a new phase, such as CuAl2, from a supersaturated solution (of copper in aluminum) has immense technological importance which motivates the attention being paid to nucleation phenomena in all metallurgical treatises [3,4].(A particularly thorough discussion is found in Ref. 5.) In all cases, nucleation phenomena are controlled by the necessity of creating an interface between the nucleated phase and the original matrix. The energy of the interface imposes special thermodynamic constraints on the evolution of the system.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 25: Symposium C – Thin Films and Interfaces II , 1983 , 3
Copyright
Copyright © Materials Research Society 1984

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References

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