College of Chemistry & Molecular Engineering; Peking University; Beijing 100871
Cite this article:
CHEN Yongchong; QI Lu; ZHANG Yonggang; CHEN Changqi. The analysis of periodic layer formation during solid state reactions. Acta Metall Sin, 2005, 41(3): 235-241 .
Abstract As one of the most interesting diffusion phenomena discovered
by Osinski et al. in 1982, the periodic layer formation
during solid state reactions is still far from a satisfactory
description. Since the successive layers have facing
surfaces with mated topography, it is
considered that the seperating of the layer from the reaction
front should relate to the diffusion-induced
stresses developing within the separating of the layer during
solid state reactions. We discovered that the layer is
fractal with clusters of phase β(FeSi in
diffusion couple Zn/Fe3Si or CoSi in diffusion couple
Zn/Co2Si, e.g.) distributing continuously in phase α
(FeZn13 or CoZn13, respectively). This
empirical fact supports the mechanical-instability
model for the pattern formation of
periodic-layered structures.
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