Novel double-ceramic-layer (La0.8Eu0.2)2Zr2O7/YSZ thermal barrier coatings deposited by plasma spraying
Source abstract
Abstract
Abstract Pyrochlore-type (La0.8Eu0.2)2Zr2O7 feedstocks prepared by spray drying have been used to produce ceramic thermal barrier coatings. Double-ceramic-layer thermal barrier coatings with a first layer of 8 wt% yttria-stabilized zirconia (YSZ) and a top layer of (La0.8Eu0.2)2Zr2O7 were deposited by plasma spraying. Plasma sprayed (La0.8Eu0.2)2Zr2O7 coatings are composed of a defect fluorite-type phase and a t-ZrO2 phase. However, after thermal shock tests at 1250 °C for 32 cycles, (La0.8Eu0.2)2Zr2O7 coatings exhibit a pyrochlore-type structure. The thermal shock failure of double-ceramic-layer (La0.8Eu0.2)2Zr2O7/YSZ coatings mainly occurs at the interface between the (La0.8Eu0.2)2Zr2O7 and YSZ layers, and is not caused by thermal grown oxide layer from the bond coat.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Nuclear Materials and Properties · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (32)
Show source-provided references
1. Thermal barrier coatings for gas-turbine engine applications10.1126/science.1068609 ↗
2. Materials design for the next generation thermal barrier coatings10.1146/annurev.matsci.33.011403.113718 ↗
3. Thermal-barrier coatings for more efficient gas-turbine engines10.1557/mrs.2012.232 ↗
4. New thermal barrier coatings based on pyrochlore/YSZ double-layer systems10.1111/j.1744-7402.2004.tb00186.x ↗
5. Ceramic materials for thermal barrier coatings10.1016/S0955-2219(03)00129-8 ↗
6. Thermal barrier coating materials10.1016/S1369-7021(05)70934-2 ↗
7. Current developments and challenges in thermal barrier coatings
8. Zirconates as new materials for thermal barrier coatings10.1111/j.1151-2916.2000.tb01506.x ↗
9. New generation perovskite thermal barrier coating materials10.1007/s11666-008-9239-4 ↗
10. Thermal conductivity of monazite-type REPO4 (RE=La, Ce, Nd, Sm, Eu, Gd)10.1111/j.1551-2916.2009.03244.x ↗
11. Preparation and thermo-physical properties of La1−xNdxMgAl11O19 (x=0, 0.1, 0.2) ceramics10.1016/j.jallcom.2009.06.068 ↗
12. Double-ceramic-layer thermal barrier coatings based on La2(Zr0.7Ce0.3)2O7/La2Ce2O7 deposited by electron beam-physical vapor deposition10.1016/j.apsusc.2010.01.004 ↗
13. Thermal aging behavior of plasma sprayed LaMgAl11O19 thermal barrier coating10.1016/j.jeurceramsoc.2011.05.036 ↗
14. Phase structure and thermophysical properties of co-doped La2Zr2O7 ceramics for thermal barrier coatings10.1016/j.ceramint.2011.12.077 ↗
15. Influence of the intermixed interfacial layers on the thermal cycling behaviour of atmospheric plasma sprayed lanthanum zirconate based coatings10.1016/j.ceramint.2012.01.066 ↗
16. Hot corrosion of V2O5-coated NdMgAl11O19 ceramic in air at 950°C10.1016/j.jeurceramsoc.2013.02.016 ↗
17. Thermal cycling behaviour of plasma sprayed lanthanum zirconate based coatings under concurrent infiltration by a molten glass concoction10.1016/j.ceramint.2012.07.084 ↗
18. Investigation of the thermal conductivity of selected compounds of lanthanum, samarium and europium10.1016/S0925-8388(97)00629-4 ↗
19. Low-thermal-conductivity rare-earth zirconates for potential thermal-barrier-coating applications10.1111/j.1151-2916.2002.tb00574.x ↗
20. Thermal conductivity and thermal expansion coefficients of the lanthanum rare-earth-element zirconate system10.1111/j.1151-2916.2003.tb03473.x ↗
21. Etude de la transformation ordre–desordre de la structure fluorite a la structure pyrochlore pour des phases (1−x)ZrO2−xLn2O310.1016/0025-5408(74)90092-0 ↗
22. Thermal stability of double-ceramic-layer thermal barrier coatings with various coating thickness10.1016/j.msea.2006.04.075 ↗
23. Novel thermal barrier coatings based on La2(Zr0.7Ce0.3)2O7/8YSZ double-ceramic-layer systems deposited by electron beam physical vapor deposition10.1016/j.jallcom.2010.12.203 ↗
24. Thermal shock behavior of 8YSZ and double-ceramic-layer La2Zr2O7/8YSZ thermal barrier coatings fabricated by atmospheric plasma spraying10.1016/j.ceramint.2011.12.076 ↗
25. Coprecipitation synthesis and sintering property of (YbxSm1–x)2Zr2O7 ceramic powders10.1179/174367609X422225 ↗
26. Effect of Gd and Yb co-doping on structure and electrical conductivity of the Sm2Zr2O7 pyrochlore10.1016/j.jpowsour.2010.05.064 ↗
27. Oxide pyrochlores – a review, Prog10.1016/0079-6786(83)90001-8 ↗
28. Rohrer · 2004 · 521
29. Samsonov · 1982
30. Energie electrostatique des reseaux pyrochlore10.1016/S0022-3697(73)80163-5 ↗
31. A review of microstructue and properties of plasma sprayed ceramic coatings10.1016/0257-8972(89)90052-2 ↗
32. Effect of thermal aging on microstructure and mechanical properties of plasma-sprayed samarium zirconate coatings10.1007/s11666-011-9658-5 ↗