Phase separation kinetics of metastable, highly supersaturated Sn-Bi single crystals

Fecht, H. J.; Tringides, M. C.
February 1988
Applied Physics Letters;2/8/1988, Vol. 52 Issue 6, p448
Academic Journal
We have utilized differential scanning calorimetry to study decomposition of a large number (≊105) of independent, metastable, highly supersaturated Sn63Bi37 single crystals. Three different growth regimes are observed: first, t1/2 diffusion-controlled growth, followed by a t1/3 regime attributed to Lifshitz–Slyozov coarsening [J. Phys. Chem. Solids 19, 35 (1961)] extended to the case of finite volume fraction, and eventually ‘‘freezing’’ of the growth possibly because of defects. The activation energy of the t1/3 growth is determined to be 0.54±0.05 eV.


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