Growth kinetics of C11b lamellae in (Mo0.85, Nb0.15)Si2 intermetallics

Scanning electron microscopy and transmission electron microscopy results show that the formation of fully lamellar structure consisting of C11b and C40 was controlled by the nucleation of C11b lamellae rather than its growth rate. As a rule, a high cooling rate leads to fine C11b lamellae and a large nucleation ratio, and at the same cooling rate, the nucleation ratio cooling from a high temperature tends to be greater than that obtained when cooling from a lower temperature.