Cyclic Hot Corrosion Failure Behaviors of EB-PVD TBC Systems in the Presence of Sulfate and Vanadate Molten Salts
Source abstract
Abstract
The cold gas dynamic spray (CGDS) method has been considered a promising technology to produce a metallic bond coat for thermal barrier coating (TBC) systems. In this study, CoNiCrAlY bond coats produced by CGDS method were coated with yttria-stabilized zirconia (YSZ) by electron beam physical vapor deposition (EB-PVD). TBCs were subjected to 50 wt % V2O5 and 50 wt % Na2SO4 molten hot corrosion salt combinations at 1000 °C. In the case of YSZ top coat on TBCs, the reaction between Na2SO4, V2O5, and Y2O3 salts generates YVO4 crystals, and these structures cause the transformation of tetragonal ZrO2 to monoclinic ZrO2. This situation occurs under operating conditions that lead to TBC failure. Hot corrosion behavior and the related failure mechanisms of TBC systems were investigated and discussed using scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) analysis, and X-ray diffractometer (XRD).
Source: crossref · Quality: baseline
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Nuclear Materials and Properties · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Metallurgical and Materials Engineering, Faculty of Engineering, Bartin University, 74100 Bartin, Turkey
Department of Mechanical Engineering, Faculty of Engineering, Bartin University, 74100 Bartin, Turkey
Department of Metallurgical and Materials Engineering, Faculty of Engineering, Karabuk University, 78050 Karabuk, Turkey
Funding
TUBİTAK
References (34)
Show source-provided references
1. Hot corrosion behavior of YSZ, Gd2Zr2O7 and YSZ/Gd2Zr2O7 thermal barrier coatings exposed to molten sulfate and vanadate salt10.1016/j.apsusc.2017.09.047 ↗
2. Hot corrosion of YSZ/Al2O3 dispersed NiCrAlY plasma-sprayed coatings in Na2SO4–10 wt.% NaCl melt10.1016/j.corsci.2010.04.007 ↗
3. Hot corrosion in gas turbine components10.1016/S1350-6307(00)00035-2 ↗
4. Materials design for the next generation thermal barrier coatings10.1146/annurev.matsci.33.011403.113718 ↗
5. Effect of shot peening on the oxidation behavior of thermal barrier coatings10.1016/j.apsusc.2015.06.113 ↗
6. Evolution of hot corrosion resistance of YSZ, Gd2Zr2O7, and Gd2Zr2O7 + YSZ composite thermal barrier coatings in Na2SO4 + V2O5 at 1050 °C10.1016/j.jeurceramsoc.2012.01.006 ↗
7. High-temperature corrosion behavior of zirconia ceramic in molten Na2SO4 + NaVO3 salt mixture10.1016/j.ceramint.2015.08.116 ↗
8. Investigating the microstructure and composition of cold gas-dynamic spray (CGDS) Ti powder deposited on Al 6063 substrate10.1016/j.surfcoat.2010.04.016 ↗
9. Grundas, S. (2011). Evaporators with induction heating and their applications. Advances in Induction and Microwave Heating of Mineral and Organic Materials, IntechOpen.10.5772/562 ↗
10. Cold gas dynamic spraying (CGDS) of TiO2 (anatase) powders onto poly(sulfone) substrates: Microstructural characterisation and photocatalytic efficiency10.1016/j.jphotochem.2006.10.023 ↗
11. Thermal barrier coatings10.1051/jp4:20013105 ↗
12. Preparation and hot corrosion behaviour of a MCrAlY + AlSiY composite coating10.1016/j.corsci.2008.08.018 ↗
13. (1996). ISO 3274:1996 Geometrical Product Specifications (GPS)–Surface Texture: Profile Method–Nominal Characteristics of Contact (Stylus) Instruments, International Organization for Standardization.
14. A comparative study on hot corrosion resistance of three types of thermal barrier coatings: YSZ, YSZ + Al2O3 and YSZ/Al2O310.1016/j.msea.2007.06.001 ↗
15. An investigation on hot corrosion behavior of YSZ-Ta2O5 in Na2SO4 + V2O5 salt at 1100 °C10.1016/j.corsci.2013.06.025 ↗
16. Investigation of three steps of hot corrosion process in Y2O3 stabilized ZrO2 coatings including nano zones10.1016/S1002-0721(14)60173-3 ↗
17. Conjugate heat transfer measurements and predictions of a blade endwall with a thermal barrier coating10.1115/1.4028233 ↗
18. Hot corrosion behavior of solution precursor and atmospheric plasma sprayed thermal barrier coatings10.1016/j.corsci.2015.05.034 ↗
19. Hot-corrosion behavior of graded thermal barrier coatings formed by plasma-spraying process10.1361/10599630421497 ↗
20. Hot corrosion behavior of MCrAlY coatings on IN738LC10.1016/j.surfcoat.2006.03.043 ↗
21. Environmental degradation of thermal-barrier coatings by molten deposits10.1557/mrs.2012.230 ↗
22. Hot corrosion behavior of laser-glazed plasma-sprayed yttria-stabilized zirconia thermal barrier coatings in the presence of V2O510.1016/j.surfcoat.2006.07.018 ↗
23. Growth of YbVO4 crystals evolved from hot corrosion reactions of Yb2Zr2O7 against V2O5 and Na2SO4 + V2O510.1016/j.apsusc.2013.03.149 ↗
24. Hot corrosion behaviors of gas tunnel type plasma sprayed La2Zr2O7 thermal barrier coatings10.1016/j.jeurceramsoc.2011.10.049 ↗
25. Technical and economical aspects of current thermal barrier coating systems for gas turbine engines by thermal spray and EBPVD: A review10.1007/s11666-007-9148-y ↗
26. The influence of laser treatment on thermal shock resistance of plasma-sprayed nanostructured yttria stabilized zirconia thermal barrier coatings10.1016/j.ceramint.2013.06.008 ↗
27. Hot corrosion, high temperature oxidation and thermal shock behavior of nanoagglomerated YSZ–alumina composite coatings produced by plasma spray method10.1016/j.surfcoat.2013.01.038 ↗
28. Improving dielectric properties of plasma sprayed calcium titanate (CaTiO3) coatings by thermal annealing10.1016/j.ceramint.2014.04.168 ↗
29. Mohan, P. (2010). Environmental Degradation of Oxidation Resistant and Thermal Barrier Coatings for Fuel-Flexible Gas Turbine Applications. [Ph.D. Thesis, University of Central Florida].
30. Hot corrosion behavior of Sc2O3–Y2O3–ZrO2 thermal barrier coatings in presence of Na2SO4 + V2O5 molten salt10.1016/j.corsci.2014.04.001 ↗
31. Hot-corrosion behavior of a La2Ce2O7/YSZ thermal barrier coating exposed to Na2SO4 + V2O5 or V2O5 salt at 900 °C10.1016/j.ceramint.2015.01.107 ↗
32. Hot corrosion behavior of rare earth zirconates and yttria partially stabilized zirconia thermal barrier coatings10.1016/j.surfcoat.2010.04.044 ↗
33. Microstructure modification of CGDS and HVOF sprayed CoNiCrAlY bond coat remelted by electron beam10.1016/j.mspro.2016.03.016 ↗
34. Development of CoNiCrAlY oxidation resistant hard coatings using high velocity oxy fuel and cold spray techniques10.1016/j.ijrmhm.2014.08.010 ↗