Abstract
The crystallization behaviour of a range of iron-based metallic glasses has been examined by isothermal differential scanning calorimetry, optical and transmission electron microscopy. It was found that the conventional procedure of applying the Johnson-Mehl-Avrami equation to determine reaction mechanisms, i.e. calculating a mean value of the Avrami exponent over a range of volume fraction transformed, can be misleading. The technique suggested by Calka and Radlinski, when used in conjunction with detailed metallography, is shown to be a more sensitive and reliable indicator of reaction mechanisms.
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Gibson, M.A., Delamore, G.W. Crystallization kinetics of some iron-based metallic glasses. J Mater Sci 22, 4550–4557 (1987). https://doi.org/10.1007/BF01132062
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DOI: https://doi.org/10.1007/BF01132062