Kinetic Models Where Nucleation and Growth Are Combined

3 Kinetic Models Where Nucleation and Growth Are Combined 

When nucleation takes place throughout a reacting solid particle and it is of the same speed as the growth of these grains, a different kinetic mechanism must be used. The mechanism called nucleation kinetics has been developed to combine these two steps into a single step. An example of this mechanism is the carboreduction of boron oxide to boron carbide. This overall reaction is written to imply that it follows a liquid-solid reaction pathway  

However, it proceeds by a two step process of (1) a solid—liquid reaction to form a gaseous suboxide, 

This reaction mechanism is limited by both the nucleation and growth of B4C(s). As a result it follows Nucleation kinetics. An extensive explanation of this mechanism is treated by Avrami [19—21], Tompkins 

Chapter 5 Ceramic Powder Synthesis with SoUd Phase Reactant 

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