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Differential thermal analysis of ignition temperatures in a self-propagating high-temperature synthesis reaction

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Abstract

Differential thermal analysis was carried out on the self-propagating high-temperature synthesis reaction 3TiO2+4Al+3C→3TiC+2Al2O3. The results allow the ignition temperature of the reaction to be estimated and the reaction mechanism to be identified. The ignition temperature was 900°C and the results suggest that the reaction proceeds by an initial reaction between titania and aluminium (3TiO2+4Al→3Ti+2Al2O3) and the titanium formed reacts with the carbon (Ti+C→TiC).

Zusammenfassung

Mittels DTA wurde die selbstaufrechterhaltende Hochtemperatur-Synthesereaktion 3TiO2+4Al+3C→3TiC+2Al2O3 untersucht. Die Ergebnisse erlauben eine Schätzung der Zündungstemperatur und eine Identifizierung des Reaktionsmechanismus. Die Zündungstemperatur betrug 900°C und die Ergebnisse lassen darauf schließen, daß es sich bei der Zündungsreaktion um die Reaktion zwischen Titanoxid und Aluminium handelt (3TiO2+4Al→3Ti+2 Al2O3) und daß das entstandene Titan dann mit dem Kohlenstoff reagiert (Ti+C→TiC).

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Bowen, C.R., Derby, B. Differential thermal analysis of ignition temperatures in a self-propagating high-temperature synthesis reaction. Journal of Thermal Analysis 42, 713–719 (1994). https://doi.org/10.1007/BF02546744

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  • DOI: https://doi.org/10.1007/BF02546744

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