https://doi.org/10.1140/epjb/e2003-00138-y
In situ measurement of high-temperature thermal diffusivity in a combustion-synthesized ceramic
1
Laboratoire d'Ingénierie des Matériaux et des Hautes Pressions
(UPR 1311) , 99 avenue J.-B. Clément, 93430 Villetaneuse, France
2
Groupe Français d'Autocombustion, GDR 2391,
J.-C. Niepce, LRRS, BP 47870, 21078 Dijon, France
3
Laboratoire de Métallurgie Physique (UMR 6630) , bâtiment SP2MI,
BP 30179, boulevard M. et P. Curie, 86962 Futuroscope Cedex, France
Corresponding author: a vrel@limhp.univ-paris13.fr
Received:
29
November
2002
Revised:
19
March
2003
Published online:
23
May
2003
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 
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.
PACS: 44.30.+v – Heat flow in porous media / 81.20.Ka – Chemical synthesis; combustion synthesis / 61.10.-i – X-ray diffraction and scattering
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003
