The statistical distribution of phantom crystallites in the Kolmogorov-Johnson-Mehl-Avrami (KJMA) model is corrected to account for the shrinking of phantom crystallites to effective size owing to the halting of crystal growth between two interfaces. In a previous paper, a stochastic treatment of shrinkage led to a kinetic equation, dX(t)l dVex = [1 -X(t)]2-y, where X(t) is the transformed fraction, Vex is the KJMA extended volume fraction, and y is a overlap probability between a phantom crystallite and a crystallite. The present paper focuses on the statistical meaning of the kinetic equation to find that crystallites of size k and phantom crystallites of different size kγm (m = 1, 2, 3,...) are generated according to the Poisson distribution as determined by γ. The other statistical features of the phantom crystallites and crystallites are fully explained in terms of γ.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Polymers and Plastics
- Metals and Alloys