Carbide particle growth, mechanism

Figure 4. Schematic of growth mechanism of filamentous carbon on iron carbide. Key left, on rectangular carbide particle and right, on carbide particle with two active faces at oblique angles. (Reproduced, with permission, from Ref. 8.)...

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 ... 

---