Abstract
Nucleation and growth rates of the MSI metastable phase crystals of the amorphous alloy Fe32Ni36Cr14P12B6 have been studied in detail using quantitative transmission electron microscopy. Three different types of activation energies are involved in the crystallization:E n for nucleation,E g for growth of the crystals, andE c for the whole process of crystallization. All three were determined experimentally:E n andE g in the present paper andE c in a former work. A general formula was developed which combines the three and was found to be in good agreement with the experimental values. Furthermore, attention has been drawn to the experimental value of the Avrami exponent which is in very good agreement with a detailed theory developed in 1955 by Ilschner, and differing with common literature values. Also, the diffusivity of metalloid in this alloy has been reported using the growth rate of MSI crystals.
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von Heimendahl, M., Kuglstatter, G. The activation energies of crystallization in the amorphous alloy METGLAS® 2826A. J Mater Sci 16, 2405–2410 (1981). https://doi.org/10.1007/BF01113576
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DOI: https://doi.org/10.1007/BF01113576