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Non-isothermal kinetic of oxidation of tungsten carbide

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Abstract

Tungsten carbide, WC, has shown dissimilar thermal behavior when it is heated on changeable heating rate and flow of oxidant atmosphere. The oxidation of WC to WO3 tends to be in a single and slow kinetic step on slow heating rate and/or low flux of air. Kinetic parameters, on non-isothermal condition, could be evaluated to the oxidation of WC to heating rate below 15°C min−1 or low flow of air (10 mL min−1). The reaction is governed by nucleation and growth at 5 to 10°C min−1 then the tendency is to be autocatalytic, JMA and SB, respectively.

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Authors and Affiliations

  1. Department of Analytical Chemistry, Chemistry Institute, São Paulo State University, UNESP, Araraquara City, São Paulo, Brazil

    C. A. Ribeiro, W. R. de Souza, Marisa Spirandeli Crespi, J. A. Gomes Neto & F. L. Fertonani

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  1. C. A. Ribeiro
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  2. W. R. de Souza
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  3. Marisa Spirandeli Crespi
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  4. J. A. Gomes Neto
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  5. F. L. Fertonani
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Correspondence to C. A. Ribeiro.

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Ribeiro, C.A., de Souza, W.R., Crespi, M.S. et al. Non-isothermal kinetic of oxidation of tungsten carbide. J Therm Anal Calorim 90, 801–805 (2007). https://doi.org/10.1007/s10973-006-8036-x

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  • DOI: https://doi.org/10.1007/s10973-006-8036-x

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