Performance Testing of Suspension Plasma Sprayed Thermal Barrier Coatings Produced with Varied Suspension Parameters
Source abstract
Abstract
Suspension plasma spraying has become an emerging technology for the production of thermal barrier coatings for the gas turbine industry. Presently, though commercial systems for coating production are available, coatings remain in the development stage. Suitable suspension parameters for coating production remain an outstanding question and the influence of suspension properties on the final coatings is not well known. For this study, a number of suspensions were produced with varied solid loadings, powder size distributions and solvents. Suspensions were sprayed onto superalloy substrates coated with high velocity air fuel (HVAF) -sprayed bond coats. Plasma spray parameters were selected to generate columnar structures based on previous experiments and were maintained at constant to discover the influence of the suspension behavior on coating microstructures. Testing of the produced thermal barrier coating (TBC) systems has included thermal cyclic fatigue testing and thermal conductivity analysis. Pore size distribution has been characterized by mercury infiltration porosimetry. Results show a strong influence of suspension viscosity and surface tension on the microstructure of the produced coatings.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Catalytic Processes in Materials Science · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Treibacher Industrie AG, Althofen 9330, Austria
Progressive Surface, Grand Rapids, MI 49512, USA
University West, Gustava Melins Gata 2, Trollhattan 461 86, Sweden
References (26)
Show source-provided references
1. Review of new developments in suspension and solution precursor thermal spray processes10.1007/s11666-011-9639-8 ↗
2. Quantification of void network architectures of suspension plasma-sprayed (SPS) yttria-stabilized zirconia (YSZ) coatings using ultra-small-angle X-ray scattering (USAXS)10.1016/j.msea.2010.06.082 ↗
3. Technical and economical aspects of current thermal barrier coating systems for gas turbine engines by thermal spray and EB-PVD: A review10.1007/s11666-007-9148-y ↗
4. Berghaus, J.O., Bouaricha, S., Legoux, J.-G., Moreau, C., and Chráska, T. (2005, January 2–4). Suspension plasma spraying of nano-ceramics using and axial injection torch. Proceedings of the International Thermal Spray Conference, Basel, Switzerland.
5. Key challenges and opportunities in suspension and solution plasma spraying10.1007/s11090-014-9594-5 ↗
6. Column formation in suspension plasma-sprayed coatings and resultant thermal properties10.1007/s11666-011-9632-2 ↗
7. Phenomena involved in suspension plasma spraying part 1: Suspension injection and behavior10.1007/s11090-006-9019-1 ↗
8. Operating parameters for suspension and solution plasma-spray coatings10.1016/j.surfcoat.2008.04.003 ↗
9. Suspension and solution thermal spray coatings10.1016/j.surfcoat.2009.03.005 ↗
10. Wolfe, H.E., and Anderson, W.H. (1964). Aerojet General Corporation Research and Development Department.
11. Influence of suspension characteristics on coatings microstructure obtained by suspension plasma spraying10.1016/j.surfcoat.2008.04.006 ↗
12. Thermal conductivity analysis and lifetime testing of suspension plasma-sprayed thermal barrier coatings10.3390/coatings4030630 ↗
13. Influence of bond coat surface roughness on the structure of axial suspension plasma spray thermal barrier coatings—Thermal and lifetime performance10.1016/j.surfcoat.2014.08.067 ↗
14. Trice, Microstructure and thermal properties of inflight rare-earth doped thermal barriers prepared by suspension plasma spray10.1016/j.jeurceramsoc.2013.11.016 ↗
15. Thermal conductivity determinations of thermal barrier coatings10.1016/S0921-5093(97)00847-2 ↗
16. Evaluation of the lifetime and thermal conductivity of dysprosia-stabilized thermal barrier coating systems10.1007/s11666-013-9932-9 ↗
17. Evolution of thermal conductivity of dysprosia stabilised thermal barrier coating systems during heat treatment10.1016/j.surfcoat.2012.08.018 ↗
18. (2010). ISO 10545-3:1995 Ceramic Tiles Part 3: Determination of Water Absorption, Apparent Porosity, Apparent Relative Density and Bulk Density, International Organization for Standardization.
19. Influence of water and ethanol on transport properties of the jets used in suspension plasma spraying10.1016/j.surfcoat.2012.10.010 ↗
20. Methods to reduce the thermal conductivity of EB-PVD TBCs10.1016/S0257-8972(01)01651-6 ↗
21. Mechanism of thermal transport in zirconia and yttria-stabilized zirconia by molecular-dynamics simulation10.1111/j.1151-2916.2001.tb01127.x ↗
22. Theory of Thermal Conduction in Thin Ceramic Films10.1023/A:1006776107140 ↗
23. Effective medium theory and the thermal conductivity of plasma-sprayed ceramic coatings10.1007/BF00355967 ↗
24. Next generation thermal barrier coatings for the gas turbine industry10.1007/s11666-010-9593-x ↗
25. Damage growth triggered by interface irregularities in thermal Barrier Coatings10.1016/j.actamat.2009.01.022 ↗
26. Oxide growth and damage evolution in thermal barrier coatings10.1016/j.engfracmech.2011.04.003 ↗