Characterization of microstructure and thermal properties of Gd2Zr2O7-type thermal barrier coating

Thermal conductivity and thermal cyclic fatigue of multilayered Gd2Zr2O7/YSZ thermal barrier coatings processed by suspension plasma spray

“…Secondly, the radiative mode of heat transfer in ceramic coating begins to show a greater influence above 900ºC. A similar trend in thermal diffusivity of APS sprayed YSZ & GZ was reported by Moskal et al [41] using the three layer (Substrate + Bond coat + Ceramic) thermal diffusivity model.…”

“…7, in the temperature range of 25 to 1000 º C due to the lower thermal diffusivity & lower specific heat capacity of GZ than YSZ [18]. SPS sprayed GZ had a lower thermal conductivity (absolute value) compared to APS sprayed GZ but their trend was similar as reported by Moskal et al [41]. Thermal conductivity values of the double and triple layered TBCs lie in between the thermal conductivities of single layer YSZ & single layer GZ.…”

Microstructure, electrical and humidity sensing properties of light rare earths zirconates

“…The X-ray diffraction XRD patterns, as can be seen in Fig. 1, reveal that the samples are pyrochlore phase and belong to the zirconates (Ln 2 Zr 2 O 7 ) group; similar results being reported [21][22][23][24][25][26][27][28][29][30][31].…”

Zirconia and Pyrochlore Oxides for Thermal Barrier Coatings in Gas Turbine Engines

“…[20,25] Although the thermal conductivity dependence on the size of the B-site (i.e., Zr in Ln 2 Zr 2 O 7 ) is stronger, the size of the A-site also has an effect, and simulations predict the lowest thermal conductivities for samarium, europium, and gadolinium on the A-site. [57] [16,18,55,56,[58][59][60][61] and 8, [16,56,[61][62][63][64][65][66][67] [67] are similarly in the lower range of the YSZ materials, as shown in Figure 9. Gd 2 Zr 2 O 7 and Sm 2 Zr 2 O 7 have received the most attention as candidate thermal barrier coating materials due to their good combination of thermal and mechanical properties.…”