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Modeling Solid-State Precipitation by Ernst Kozeschnik

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Chapter 1

Thermodynamic Basis of Phase Transformations

Precipitation is the phenomenon by which particles of a new phase form out of a supersaturated solid solution. Precipitation reactions commonly occur within a closed region in space. As we are usually able to define the precise spatial boundaries between the precipitation system and the surroundings, precipitation reactions can be considered within the framework of a thermodynamic system.

In a thermodynamic system, all processes are described by the laws of thermodynamics. The state of the system is characterized by a set of thermodynamic parameters associated with the system. Typical parameters of this kind are experimentally measurable macroscopic quantities related to the constitution ...

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