Jf. Bisson et al., Thermal conductivity of yttria-zirconia single crystals, determined with spatially resolved infrared thermography, J AM CERAM, 83(8), 2000, pp. 1993-1998
The thermal diffusivity of yttria-zirconia (Y2O3-ZrO2) single crystals, wit
h YO1.5 concentrations in the range of 0-60 mol%, has been determined using
a new method that is based on spatially resolved (20 mu m) infrared mappin
g of a modulated thermal field. The decreasing trend of the thermal conduct
ivity (K), as a function of the YO1.5 content (up to 20 mol%), can be descr
ibed using a model based on a Debye approach that has been modified hg intr
oducing a cut-off length for the phonon mean free path. At higher concentra
tions, K increases, as a result of a possible ordering of the point defects
.