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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, 50 (5 - 6). 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 accurate evaluation of thermogravimetric data to identify diffusion or partial diffusion control of scaling kinetics. This method is based on the fitting of mass-gain data to a parabola over a short time interval. The translation of the time interval over the entire test time period provides an actual instantaneous parabolic rate constant independently of any transient stage or simultaneous reaction steps. The usefulness and limitations of this procedure are illustrated from oxidation tests performed on several metallic materials (pure nickel, single-crystal superalloys, 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
HAL Id:hal-03607751
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
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Deposited On:30 Jun 2009 09:13

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