Initial crystallization reactions. Perepezko, J., H. and Allen, D., R. Technical Report 2000.
Initial crystallization reactions [pdf]Paper  abstract   bibtex   
During the initial stage of phase formation reactions nucleation conditions often apply a controlling influence on the phase selection, product phase no. d. and grain size. In most cases the operation of nucleation control is also assocd. with the development of significant undercooling or supersatn. to initiate crystn. Under this constraint it is common to observe different forms of alloy metastability. In fact, a hierarchy of equil. can be identified based upon the severity of the kinetic constraints that act during transformation. One consequence of the different levels of metastability is the development of precursor reactions before the initial crystn. In other cases a kinetic competition between different reaction mods or structures can yield a change in the transformation pathway during reaction. The appearance of kinetic transitions is one consequence of the competition between concurrent reactions and provides a valuable opportunity for kinetics anal. and modeling. In cases where sequential reactions are sepd. by temp. or time intervals other kinetic constraints operate to expose metastability due to diffusional growth limitations. The identification of the reaction control provides the foundation for kinetics anal. and the development of alloy design strategies. These features can be considered in terms of the obsd. crystn. behavior during rapid solidification and solid state interface reactions.
@techreport{
 title = {Initial crystallization reactions},
 type = {techreport},
 year = {2000},
 source = {Materials Research Society Symposium Proceedings},
 identifiers = {[object Object]},
 keywords = {Alloys Role: PEP (Physical, engineering or chemica,Crystal nucleation,Crystallization,Supercooling,Supersaturation (initial crystn. reactions: underc,initial crystn reaction},
 pages = {221-232},
 volume = {580},
 issue = {Nucleation and Growth Processes in Materials},
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 abstract = {During the initial stage of phase formation reactions nucleation conditions often apply a controlling influence on the phase selection, product phase no. d. and grain size. In most cases the operation of nucleation control is also assocd. with the development of significant undercooling or supersatn. to initiate crystn. Under this constraint it is common to observe different forms of alloy metastability. In fact, a hierarchy of equil. can be identified based upon the severity of the kinetic constraints that act during transformation. One consequence of the different levels of metastability is the development of precursor reactions before the initial crystn. In other cases a kinetic competition between different reaction mods or structures can yield a change in the transformation pathway during reaction. The appearance of kinetic transitions is one consequence of the competition between concurrent reactions and provides a valuable opportunity for kinetics anal. and modeling. In cases where sequential reactions are sepd. by temp. or time intervals other kinetic constraints operate to expose metastability due to diffusional growth limitations. The identification of the reaction control provides the foundation for kinetics anal. and the development of alloy design strategies. These features can be considered in terms of the obsd. crystn. behavior during rapid solidification and solid state interface reactions.},
 bibtype = {techreport},
 author = {Perepezko, J H and Allen, D R}
}
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