Kinetics of spinodal decomposition at = 0.30, = 0.08, AM /kT = −3, BM /kT = −7, = 0, σ A(B) (R/L) 2 /kT = 4 × 10 -4 , σ AB = 0, /D A = 10 -2 , /D A = 1, and D A = const.

Contexts in source publication

Context 1

... precipitate volume, (Figs. 1, 5, and 9). At a high diffusion rate of component B, solitary precipitates of this component or a branching structure of alternating precipitates of two types arise (Fig. 8). ...

Context 2

... the alloy decomposes in the alloy volume by component B, even before the occurrence of precipitates A. In this case, the modeling results shows that, up to very high concentrations around precipitates A, chains of small precipitates of component B rather than a solid shell are formed, which, however, are sufficient for decomposition inhibition (Figs. 5 and 7). Note that the observed effect has some similarities with the pinning phenomenon of grain boundary precipitation preventing the development of the recrystallization process ...

Context 3

... general and remain valid, despite model simplicity and the used approximations (continuum diffusion equations in the mean field approximation, coherent conjugation of precipitates, and the absence of elastic interaction of precipitates). Although most of the results presented here are related to precipitate nucleation by the spinodal mechanism (Figs. 5-11), conclusions about the conditions for stabilization of the dispersed state due to the shell formation around the precipitate should be valid for other (fluctuation and heterogeneous) nucleation scenarios. Note that, in the case of semicoherent precipitates, enrichment of the interphase boundary with an impurity can be realized due to ...