In situ measurement of high-temperature thermal diffusivity in a combustion-synthesized ceramic |
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| Authors: | D Vrel S Dubois EM Heian N Karnatak M-F Beaufort |
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| Institution: | 1.Laboratoire d'Ingénierie des Matériaux et des Hautes Pressions, 99 avenue J.-B. Clément, 93430 Villetaneuse, France,FR;2.Laboratoire de Métallurgie Physique, batiment SP2MI, BP 30179, boulevard M. et P. Curie, 86962 Futuroscope Cedex, France,FR |
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| Abstract: | A simple method to calculate thermal diffusivity in situ after a combustion synthesis reaction is presented. The combustion reaction was analyzed via time-resolved X-ray diffraction analysis and infrared thermography. Thermal diffusivity was estimated and used to calculate
temperature profiles based on temperature profiles one second earlier. For a sample of TiC formed from Ti and C, a value of
2.00×10-6±0.20×10-6 m2 s-1 was calculated for temperatures between 1000 and 1900 K. This method is rapid and can avoid some problems associated with
furnace-based measurements of thermal diffusivity, such as recrystallization and destruction of non-equilibrium phases.
Received 29 November 2002 / Received in final form 19 March 2003 Published online 23 May 2003
RID="a"
ID="a"e-mail: vrel@limhp.univ-paris13.fr
RID="b"
ID="b"UPR 1311
RID="c"
ID="c"UMR 6630 |
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| Keywords: | PACS 44 30 +v Heat flow in porous media – 81 20 Ka Chemical synthesis combustion synthesis – 61 10 -i X-ray diffraction and scattering |
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