A case study on CMAS corrosion of an in-situ microstructure modification YSZ TBCs fabricated by EB-PVD
Source abstract
Abstract
Abstract At elevated temperature, the inter-columnar pores of electron beam physical vapor deposited (EB-PVD) thermal barrier coatings (TBCs) may act as infiltration channels for the molten calcium–magnesium–alumino-silicate (CMAS) and, therefore, makes it susceptible to be attacked by CMAS. To enhance the CMAS corrosion resistance of EB-PVD TBCs, a microstructure modification yttria-stabilized zirconia (YSZ) top coat consisting of a low porosity fibrous structure layer on the conventional columnar structure layer was fabricated by in-situ parameter modification. The anti-CMAS corrosion performance of the in-situ modified YSZ coating was evaluated at 1250 °C and the evolution of the microstructure was investigated in detail. The results show that the inter-columnar pores were sealed by the low-porosity and smooth fibrous structure layer. Due to the porosity and the size of the pores of the fibrous structure layer are dramatically reduced, the penetration rate of CMAS is significantly lower in the in-situ microstructure modification coating than in the conventional columnar structure coating, and the interaction between CMAS and YSZ coating was also reduced.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Nuclear Materials and Properties · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (34)
Show source-provided references
1. Nitin P. Padture, Maurice Gell, Eric H. Jordan. Thermal barrier coatings for gas-turbine engine applications. Science, 296 (5566) 280–284. doi:https://doi.org/10.1126/science.1068609.10.1126/science.1068609 ↗
2. A delamination mechanism for thermal barrier coatings subject to calcium-magnesium-alumino-silicate (CMAS) infiltration10.1016/j.actamat.2004.11.028 ↗
3. CMAS degradation of EB-PVD TBCs: the effect of basicity10.1016/j.surfcoat.2015.03.009 ↗
4. Thermochemical interaction of thermal barrier coatings with molten CaO-MgO-Al2O3-SiO2 (CMAS) deposits10.1111/j.1551-2916.2006.01209.x ↗
5. Effects of CMAS penetration on the delamination cracks in EB-PVD thermal barrier coatings with curved interface10.1016/j.ceramint.2017.04.025 ↗
6. Mechanical and thermal properties of calcium-magnesium aluminosilicate (CMAS) glass10.1016/j.jeurceramsoc.2015.03.032 ↗
7. Lifetime and failure modes of plasma sprayed thermal barrier coatings in thermal gradient rig tests with simultaneous CMAS injection10.1016/j.surfcoat.2017.04.071 ↗
8. Composition effects of thermal barrier coating ceramics on their interaction with molten Ca-Mg-Al-silicate (CMAS) glass10.1016/j.actamat.2012.06.053 ↗
9. Novel thermal barrier coatings that are resistant to high-temperature attack by glassy deposits10.1016/j.actamat.2007.08.028 ↗
10. Stephan Krämer, James Yang, Carlos G. Levi. Infiltration-inhibiting reaction of gadolinium zirconate thermal barrier coatings with CMAS melts. J. Am. Ceram. Soc., 91(2008) 576–583. doi:https://doi.org/10.1111/j.1551-2916.2007.02175.x.10.1111/j.1551-2916.2007.02175.x ↗
11. 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 ↗
12. Volcanic ash-induced decomposition of EB-PVD Gd2Zr2O7 thermal barrier coatings to Gd-oxyapatite, zircon, and Gd, Fe-zirconolite10.1111/jace.12251 ↗
13. Method of forming a coating resistant to deposits and coating formed thereby
14. EB-PVD alumina (Al2O3) as a top coat on 7YSZ TBCs against CMAS/VA infiltration: deposition and reaction mechanisms10.1016/j.jeurceramsoc.2018.03.027 ↗
15. Molten silicate interactions with thermal barrier coatings10.1016/j.surfcoat.2014.04.007 ↗
16. CMAS-resistant thermal barrier coatings (TBC)10.1111/j.1744-7402.2009.02373.x ↗
17. 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 ↗
18. Laser surface modification of porous yttria stabilized zirconia against CMAS degradation10.1016/j.ceramint.2019.11.061 ↗
19. Effects of laser glazing on CMAS corrosion behavior of Y2O3 stabilized ZrO2 thermal barrier coatings10.1016/j.corsci.2019.06.025 ↗
20. Microstructure, texture and thermal cycling performance of EB-PVD TBCs deposited under different processing conditions10.1515/htmp.2011.111 ↗
21. Tailoring the EB-PVD columnar microstructure to mitigate the infiltration of CMAS in 7YSZ thermal barrier coatings10.1016/j.jeurceramsoc.2016.07.027 ↗
22. Estimation of CMAS infiltration depth in EB-PVD TBCs: a new constraint model supported with experimental approach10.1016/j.jeurceramsoc.2019.02.040 ↗
23. Melting and crystallization of silicate systems relevant to thermal barrier coating damage10.1111/jace.13478 ↗
24. Microstructure and texture of EB-PVD TBCs grown under different rotation modes10.1016/S0921-5093(03)00470-2 ↗
25. High rate thick film growth10.1146/annurev.ms.07.080177.001323 ↗
26. Properties of PECVD-deposited thermal barrier coatings10.1016/S0257-8972(01)01211-7 ↗
27. Effect of substrate rotation on texture evolution in ZrO2 – 4 mol% Y2O3 layers fabricated by EB-PVD10.1016/j.surfcoat.2004.02.008 ↗
28. Influence of porosity on hardness and Young’s modulus of nanoporous EB-PVD TBCs by nanoindentation10.1016/j.matlet.2005.06.014 ↗
29. Fluid flow through granular beds10.1016/S0263-8762(97)80003-2 ↗
30. On the use of the Kozeny-Carman equation to predict the hydraulic conductivity of soils10.1139/t03-013 ↗
31. Simple expression for the tortuosity of porous media10.1007/s11242-011-9734-9 ↗
32. Impact interaction of in-flight high-energy molten volcanic ash droplets with jet engines10.1016/j.actamat.2019.04.011 ↗
33. The effect of TBC morphology on the erosion rate of EB-PVD TBCs10.1016/j.wear.2004.04.011 ↗
34. Erosion behavior of EB-PVD 7YSZ coatings under corrosion/erosion regime: effect of TBC microstructure and the CMAS chemistry10.1016/j.jeurceramsoc.2018.06.039 ↗