Improved resistance of lanthanum zirconate coatings to calcium-magnesium-alumina-silicate corrosion through composition tailoring
Source abstract
Abstract
Abstract Calcium–magnesium–alumina–silicate (CMAS) corrosion resistance is an important issue on the design of next-generation thermal battier coatings. As one of the promising thermal battier coatings, the lanthanum zirconate coating has attracted continuous attention. In this work, three lanthanum zirconate coatings with different La/Zr composition, i.e., La1.8Zr2.2O7.1, La2Zr2O7, and La2.5Zr1.5O6.75, are fabricated by laser-enhanced chemical vapour deposition, and their resistance to CMAS corrosion at 1250 °C is investigated. Among them, La2.5Zr1.5O6.75 shows the best CMAS corrosion resistance because increased La content is beneficial to the formation of a dense and continuous apatite Ca2La8(SiO4)6O2 layer, which effectively slows down the subsequent molten CMAS penetration. This study clarifies the significant role of rare earth on CMAS corrosion resistance and is expected to guide the future design of rare-earth-based thermal battier coatings through composition tailoring.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Nuclear materials and radiation effects · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (46)
Show source-provided references
1. Thermal barrier coatings for gas-turbine engine applications10.1126/science.1068609 ↗
2. Effect of post heat treatment on thermal durability of thermal barrier coatings in thermal fatigue tests10.1016/j.surfcoat.2012.08.078 ↗
3. Thermal-barrier coatings for more efficient gas-turbine engines10.1557/mrs.2012.232 ↗
4. Role of environment deposits and operating surface temperature in spallation of air plasma sprayed thermal barrier coatings10.1016/S0257-8972(96)02994-5 ↗
5. The hotter the engine, the better10.1126/science.1179327 ↗
6. Thermal stability of lanthanum zirconate plasma-sprayed coating10.1111/j.1151-2916.2001.tb00962.x ↗
7. Failure analysis of Gd2Zr2O7/YSZ multi-layered thermal barrier coatings subjected to thermal cyclic fatigue10.1016/j.jallcom.2016.07.333 ↗
8. CMAS-resistant thermal barrier coatings (TBC)10.1111/j.1744-7402.2009.02373.x ↗
9. Protectiveness of Pt and Gd2Zr2O7 layers on EB-PVD YSZ thermal barrier coatings against calcium–magnesium–alumina–silicate (CMAS) attack10.1016/j.ceramint.2015.05.128 ↗
10. Enhanced properties of Al-modified EB-PVD 7YSZ thermal barrier coatings10.1016/j.ceramint.2016.05.210 ↗
11. Novel thermal barrier coatings based on rare-earth zirconates/YSZ double-ceramic-layer system deposited by plasma spraying10.1016/j.jallcom.2015.05.189 ↗
12. Low-thermal-conductivity rare-earth zirconates for potential thermal-barrier-coating applications
13. Gadolinium zirconate/YSZ thermal barrier coatings: plasma spraying, microstructure, and thermal cycling behavior10.1111/jace.13204 ↗
14. Low thermal conductivity oxides10.1557/mrs.2012.234 ↗
15. Theoretical elastic stiffness, structure stability and thermal conductivity of La2Zr2O7 pyrochlore10.1016/j.actamat.2006.12.035 ↗
16. Preparation and characterization of La2Zr2O7 coating with the addition of Y2O3 by EB-PVD10.1016/j.jallcom.2009.12.022 ↗
17. Mechanisms of mono-Vacancy and oxygen permeability in Y2SiO5 orthosilicate studied by first-principles calculations10.1111/j.1551-2916.2011.05046.x ↗
18. Optimum pyrochlore compositions for low thermal conductivity10.1080/09500830310001646699 ↗
19. Theoretical elastic stiffness, structural stability and thermal conductivity of La2T2O7 (T=Ge, Ti, Sn, Zr, Hf) pyrochlore10.1016/j.actamat.2010.04.031 ↗
20. Oxide materials with low thermal conductivity10.1111/j.1551-2916.2006.01410.x ↗
21. Infiltration-inhibiting reaction of gadolinium zirconate thermal barrier coatings with CMAS melts10.1111/j.1551-2916.2007.02175.x ↗
22. Environmental degradation of thermal-barrier coatings by molten deposits10.1557/mrs.2012.230 ↗
23. Composition effects of thermal barrier coating ceramics on their interaction with molten Ca–Mg–Al–silicate (CMAS) glass10.1016/j.actamat.2012.06.053 ↗
24. Degradation of La2Zr2O7 and other novel EB-PVD thermal barrier coatings by CMAS (CaO–MgO–Al2O3–SiO2) and volcanic ash deposits10.1016/j.surfcoat.2013.07.029 ↗
25. Plasma-sprayed La2Ce2O7 thermal barrier coatings against calcium–magnesium–alumina–silicate penetration10.1016/j.jeurceramsoc.2014.02.031 ↗
26. Hot corrosion behaviour of La2(Zr0.7Ce0.3)2O7 thermal barrier coating ceramics exposed to molten calcium magnesium aluminosilicate at different temperatures10.1016/j.corsci.2015.08.031 ↗
27. La2(Zr0.7Ce0.3)2O7 thermal barrier coatings prepared by electron beam-physical vapor deposition that are resistant to high temperature attack by molten silicate
28. Mechanisms of cracking and delamination within thick thermal barrier systems in aero-engines subject to calcium-magnesium-alumino-silicate (CMAS) penetration10.1016/j.msea.2008.01.006 ↗
29. A delamination mechanism for thermal barrier coatings subject to calcium–magnesium–alumino-silicate (CMAS) infiltration10.1016/j.actamat.2004.11.028 ↗
30. 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 ↗
31. Degradation of EB-PVD thermal barrier coatings caused by CMAS deposits10.1016/j.pnsc.2012.06.007 ↗
32. Thermochemical interaction of thermal barrier coatings with molten CaO-MgO-Al2O3-SiO2 (CMAS) deposits10.1111/j.1551-2916.2006.01209.x ↗
33. Plasma-sprayed thermal barrier coatings: new materials, processing issues, and solutions10.1007/s11666-013-9889-8 ↗
34. Thermochemistry of lanthanum zirconate pyrochlore10.1557/jmr.2009.0401 ↗
35. Fabrication of columnar structured lanthanum zirconate films by laser CVD10.1111/jace.14923 ↗
36. High-speed deposition of yttria-stabilized zirconia and titania films by laser chemical vapor deposition10.2109/jcersj.114.161 ↗
37. Thermal barrier coatings produced by chemical vapor deposition10.1016/S1468-6996(03)00048-2 ↗
38. Role of environmental deposits and operating surface temperature in spallation of air plasma sprayed thermal barrier coatings10.1016/S0257-8972(96)02994-5 ↗
39. Stability and CMAS resistance of ytterbium-silicate/hafnate EBCs/TBC for SiC composites10.1111/jace.13262 ↗
40. Effect of La/Zr ratio in the precursor solution on the properties of La2Zr2O7 and CeO2/La2Zr2O7 films
41. Preparation and thermophysical properties of CeO2 doped La2Zr2O7 ceramic for thermal barrier coatings10.1016/j.jallcom.2006.08.005 ↗
42. High-temperature interaction of yttria stabilized zirconia coatings with CaO–MgO–Al2O3–SiO2 (CMAS) deposits10.1016/j.surfcoat.2009.07.034 ↗
43. Plasma sprayed gadolinium zirconate thermal barrier coatings that are resistant to damage by molten Ca–Mg–Al–silicate glass10.1016/j.surfcoat.2012.03.051 ↗
44. Mitigation of damage from molten fly ash to air-plasma-sprayed thermal barrier coatings10.1016/j.msea.2011.06.041 ↗
45. Jet engine coatings for resisting volcanic ash damage10.1002/adma.201004783 ↗
46. Volcanic ash-induced decomposition of EB-PVD Gd2Zr2O7 thermal barrier coatings to Gd-oxyapatite, zircon, and Gd, Fe-zirconolite10.1111/jace.12251 ↗