Conditions Extrêmes et Matériaux : Haute Température et Irradiation
CEMHTI - UPR3079 CNRS

utilisateur non identifié  |   Login

View CEMHTI Publication

Return to publication search...
Ask for a reprint
email :  


2011

ACL
doi
HAL

L.del Campo, D.De Sousa Meneses, A.Blin, B.Rousseau, E.Véron, M.Balat-Pichelin, P.Echegut, 'High temperature radiative properties of partially yttria-stabilized hafnia ceramics', J. Am. Ceram. Soc. 94 1859-1864 (2011) doi:10.1111/j.1551-2916.2010.04336.x

The normal spectral emittance of partially yttria-stabilized hafnia ceramics has been measured by infrared emittance spectroscopy in a spectral range going from 60 to 17500 cm-1 (0.075- 2.2 eV), and up to 2350 K. Using these experimental data, the temperature dependence of the absorption coefficient and the total emittance have been calculated. The physical mechanisms explaining the spectral features of the whole set of spectra are exposed qualitatively. The spectral weight of each contribution is then discussed for interpreting the influence of temperature on the total normal emittance in the range of temperatures [1200-2500 K] where yttria-stabilized hafnia ceramics can be used for their refractory properties (thermal barrier coating, nuclear reactor, thermal protection systems, etc.