Application of High-Velocity Oxygen-Fuel (HVOF) Spraying to the Fabrication of Yb-Silicate Environmental Barrier Coatings
Source abstract
Abstract
From the literature, it is known that due to their glass formation tendency, it is not possible to deposit fully-crystalline silicate coatings when the conventional atmospheric plasma spraying (APS) process is employed. In APS, rapid quenching of the sprayed material on the substrate facilitates the amorphous deposit formation, which shrinks when exposed to heat and forms pores and/or cracks. This paper explores the feasibility of using a high-velocity oxygen-fuel (HVOF) process for the cost-effective fabrication of dense, stoichiometric, and crystalline Yb2Si2O7 environmental barrier coatings. We report our findings on the HVOF process optimization and its resultant influence on the microstructure development and crystallinity of the Yb2Si2O7 coatings. The results reveal that partially crystalline, dense, and vertical crack-free EBCs can be produced by the HVOF technique. However, the furnace thermal cycling results revealed that the bonding of the Yb2Si2O7 layer to the Silicon bond coat needs to be improved.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Advanced ceramic materials synthesis · Nuclear Materials and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK-1), 52425 Jülich, Germany
German Aerospace Center, Institute of Structures and Design, 70569 Stuttgart, Germany
References (30)
Show source-provided references
1. Combustion and environmental challenges for gas turbines in the 1990s10.2514/3.23722 ↗
2. Jacobson, N.S., Smialek, J.L., Fox, D.S., and Opila, E.J. (1995). Durability of Silica-Protected Ceramics in Combustion Atmospheres, American Ceramic Society.
3. Potential application of ceramic matrix composites to aero-engine components10.1016/S1359-835X(98)00139-0 ↗
4. Bansal, N.P. (2005). Handbook of Ceramic Composites, Kluwer.10.1007/b104068 ↗
5. Bansal, N.P., and Lamon, J. (2014). Ceramic Matrix Composites: Materials, Modeling and Technology, Wiley.10.1002/9781118832998 ↗
6. Paralinear oxidation of CVD SiC in water vapor10.1111/j.1151-2916.1997.tb02810.x ↗
7. SiC recession caused by SiO2 scale volatility under combustion conditions: I, experimental results and empirical model10.1111/j.1151-2916.1999.tb02004.x ↗
8. SiC and Si3N4 recession due to SiO2 scale volatility under combustor conditions10.1163/156855199X00056 ↗
9. SiC recession caused by SiO2 scale volatility under combustion conditions: II, thermodynamics and gaseous-diffusion model10.1111/j.1151-2916.1999.tb02005.x ↗
10. Current status of environmental barrier coatings for Si-based ceramics
11. Eaton, H.E., Linsey, G.D., More, K.L., Kimmel, J.B., Price, J.R., and Miriyala, N. (2000, January 8–11). EBC Protection of SiC/SiC Composites in the Gas Turbine Combustion Environment. Proceedings of the ASME Turbo Expo 2000: Power for Land, Sea, and Air, Munich, Germany.10.1115/2000-GT-0631 ↗
12. Eaton, H.E., Linsey, G.D., Sun, E.Y., More, K.L., Kimmel, J.B., Price, J.R., and Miriyala, N. (2001, January 4–7). EBC Protection of SiC/SiC Composites in the Gas Turbine Combustion Environment: Continuing Evaluation and Refurbishment Considerations. Proceedings of the ASME Turbo Expo 2001: Power for Land, Sea, and Air, New Orleans, LA, USA.10.1115/2001-GT-0513 ↗
13. Upper temperature limit of environmental barrier coatings based on mullite and BSAS10.1111/j.1151-2916.2003.tb03466.x ↗
14. Rare earth silicate environmental barrier coatings for SiC/SiC composites and Si3N4 ceramics10.1016/j.jeurceramsoc.2004.12.013 ↗
15. Structure, composition, and defect control during plasma spray deposition of ytterbium silicate coatings10.1007/s10853-015-9358-5 ↗
16. Response of ytterbium disilicate–silicon environmental barrier coatings to thermal cycling in water vapor10.1016/j.actamat.2015.12.053 ↗
17. Bakan, E., Marcano, D., Zhou, D., Sohn, Y.J., Mauer, G., and Vaßen, R. (2017). Yb2Si2O7 coatings deposited by various thermal spray techniques: A preliminary comparative study. J. Therm. Spray Technol., submitted.10.1007/s11666-017-0574-1 ↗
18. The influence of nozzle design on HVOF exit gas velocity and coating microstructure10.1007/s11666-997-0033-5 ↗
19. Development of polyvinylsilazane-derived ceramic matrix composites based on Tyranno SA3 fibers10.2109/jcersj2.16107 ↗
20. Gordon, S., and MeBride, B.J. (1994). Computer Program for Calculation of Complex Chemical Equilibrium Compositions and Applications. I. Analysis, Lewis Research Center.
21. Quantification of phases with partial or no known crystal structures10.1154/1.2362855 ↗
22. (1996). ISO 4288:1996–Geometrical Product Specifications (GPS)–Surface Texture: Profile Method–Rules and Procedures for the Assessment of Surface Texture, International Organization for Standardization.
23. (1996). ISO 3274:1996–Geometrical Product Specifications (GPS)–Surface Texture: Profile Method–Nominal Characteristics of Contact (Stylus) Instruments, International Organization for Standardization.
24. Glassman, I. (1997). Combustion, Elsevier Science.
25. Multi-scale modeling and analysis of an industrial HVOF thermal spray process10.1016/j.ces.2005.02.043 ↗
26. Effect of oxygen/fuel ratio on the in-flight particle parameters and properties of HVOF WC-CoCr coatings10.1016/j.surfcoat.2011.03.129 ↗
27. A numerical study of high-velocity oxygen fuel thermal spraying process. Part I: Gas phase dynamics10.1007/s11661-001-0139-1 ↗
28. Study of HVOF spraying of WC–CoCr using on-line particle monitoring10.1016/j.surfcoat.2003.12.024 ↗
29. On the role of particle state and deposition procedure on mechanical, tribological and dielectric response of high velocity oxy-fuel sprayed alumina coatings10.1016/j.msea.2005.08.226 ↗
30. Relationships between in-flight particle characteristics and properties of HVOF sprayed WC-CoCr coatings10.1016/j.jmatprotec.2013.09.029 ↗