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An analysis method for nucleation and growth controlled reactions at constant heating rate

Starink, M.J. and Zahra, A.-M. (1997) An analysis method for nucleation and growth controlled reactions at constant heating rate Thermochimica Acta, 292, (1-2), pp. 159-168. (doi:10.1016/S0040-6031(96)03135-8).

Record type: Article

Abstract

A quantitative model is derived for the progress of a nucleation and growth controlled reaction during heating at a constant rate. It incorporates nucleation, growth, and impingement, takes account of temperature dependent solubility, and distinguishes between diffusion controlled growth and linear growth. Parameters of the model for a single process reaction are: s, which is akin to the Avrami parameter for isothermal analysis, Eeff the effective activation energy, ?i the impingement parameter, and a pre-exponential constant. The model is applied to the DSC data on precipitation in Al---Si alloys. An excellent agreement between data and model is obtained. The parameter s is interpreted in terms of the processes taking place, namely growth of small nuclei, growth of coarse particles or nucleation and growth.

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Published date: 1997
Keywords: Al---Si alloys, differential scanning calorimetry (DSC), johnson-mehl-avrami-kolmogorov (JMAK) model, non-isothermal analysis, nucleation and growth

Identifiers

Local EPrints ID: 21703
URI: http://eprints.soton.ac.uk/id/eprint/21703
ISSN: 0040-6031
PURE UUID: 9160d099-bf1c-4425-951c-d9d21c53379f

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Date deposited: 14 Dec 2006
Last modified: 17 Jul 2017 16:25

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Contributors

Author: M.J. Starink
Author: A.-M. Zahra

University divisions

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