The fragmented particles then spheroidize
Indeed, as the lamellae break into smaller elements and spheroidize, the hardness drops (Krauss, 2005).
Both morphological parameters are related to the change of microstructure: the lamellae break up into smaller elements and then spheroidize.
The second purpose of solution treatment is to spheroidize
constituents that are present in quantities that cannot be fully dissolved.
Finally, heat treating them spheroidizes
the silicon particles, giving you a damage-tolerant structure with a uniform distribution of silicon.