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Determination of Parabolic Rate Constants from a Local Analysis of Mass-Gain Curves

Monceau, Daniel and Pieraggi , Bernard Determination of Parabolic Rate Constants from a Local Analysis of Mass-Gain Curves. (1998) Oxidation of Metals, vol. 50 (n° 5 - 6). pp. 477-493. ISSN 0030-770X

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Official URL: http://dx.doi.org/10.1023/A:1018860909826

Abstract

A method is proposed to allow a more accurateevaluation of thermogravimetric data to identifydiffusion or partial diffusion control of scalingkinetics. This method is based on the fitting ofmass-gain data to a parabola over a short time interval.The translation of the time interval over the entiretest time period provides an actual instantaneousparabolic rate constant independently of any transient stage or simultaneous reaction steps. Theusefulness and limitations of this procedure areillustrated from oxidation tests performed on severalmetallic materials (pure nickel, single-crystalsuperalloys, and NbTi-Al alloy).

Item Type:Article
Additional Information:Thanks to Springer Verlag editor. The definitive version is available at http://www.springerlink.com The original PDF of the article can be found at Oxidation of Metals website : http://www.springerlink.com/content/101598/?p=696ab4f8f2fb4406901ce68992e2d624&pi=0
Audience (journal):International peer-reviewed journal
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Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By:Celine Cabaup

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