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Activation energy of self-heating process Studied by DSC

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Abstract

In order to identify the kinetic process of self-heating in DSC experiment for Ti+3Al→TiAl3 reaction, two approaches, linear-fitting approach developed from Semenov"s theory of spontaneous ignition and variation of Friedman method, were carried out with cylindrical Ti-75 at% Al samples. Following these approaches, two identical activation energies are obtained as 169±15 kJ mol-1 and 170±5 kJ mol-1, respectively. Compared with the activation energies of reactions and interdiffusions between Ti and Al, the possible rate-controlling process of self-heating in DSC experiment for Ti+3Al→TiAl3 reaction is the interdiffusion between Ti and Al through TiAl3-layer.

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Authors and Affiliations

  1. Department of Materials Engineering, Dalian University of Technology, Dalian, 116024, People"s Republic of China

    T. Wang, R. Y. Liu, M. L. Zhu & J. S. Zhang

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  1. T. Wang
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  2. R. Y. Liu
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  3. M. L. Zhu
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  4. J. S. Zhang
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Wang, T., Liu, R.Y., Zhu, M.L. et al. Activation energy of self-heating process Studied by DSC. Journal of Thermal Analysis and Calorimetry 70, 507–519 (2002). https://doi.org/10.1023/A:1021684726126

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