The paper describes the procedure of determination of thermal properties (thermal diffusivity and thermal
conductivity) of yttria/ceria stabilized zirconia coatings. The coatings were deposited by suspension plasma
spraying method using SG-100 torch. The commercial powder with a chemical composition ZrO2 + 24 wt.%
CeO2 + 2.5 wt.% Y2O3 was used and coatings were sprayed onto stainless steel substrates. The suspensions
consisted of zirconia powder, water, ethanol and small addition of dispersant. The design of spray experiments
included the following variable process parameters: (i) spray distance; and (ii) torch scan linear speed. The microstructure
of coatings was determined by scanning electron microscopy (SEM) and X-ray diffraction (XRD).
The phase composition and the crystallite size of coatings were estimated by Rietveld method. The different
methods were used to find out the thermal properties values up to 573 K. Firstly, thermal diffusivity of YCSZ
coatingswas determined by using a commercial setup and the obtained resultswere used to calculate the values
of thermal conductivity. Then, to check the validity of themeasurements and calculations, the simulations of laser
flash experiment were made using COMSOLMultiphysics software. The least square method enabled to find the
optimized value of thermal conductivity. Finally, the use of another setup enabled to find out the thermal transport
properties in the temperature up to 873 K.