Quantification of void network architectures of suspension plasma-sprayed (SPS) yttria-stabilized zirconia (YSZ) coatings using Ultra-small-angle X-ray scattering (USAXS)

Bacciochini, A.; Ilavský, Ján; Montavon, Ghislain; Denoirjean, Alain; Ben-Ettouil, F.; Valette, Stéphane; Fauchais, Pierre; Wittmann-Ténèze, K.

doi:10.1016/j.msea.2010.06.082

Cited by 39 publications

(16 citation statements)

References 43 publications

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“…The cyclic lifetime performance of SPS YSZ coatings can be attributed to columnar-type microstructures that mimic the strain tolerant behavior of EB-PVD coatings systems [2]. Common wisdom held that these strain tolerant, columnar microstructures were only possible by vapor deposition techniques, yet SPS utilizes air plasma spray-based equipment.…”

Section: Introductionmentioning

confidence: 99%

Performance Testing of Suspension Plasma Sprayed Thermal Barrier Coatings Produced with Varied Suspension Parameters

Curry

VanEvery²,

Snyder³

et al. 2015

Coatings

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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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Section: Introductionmentioning

confidence: 99%

Performance Testing of Suspension Plasma Sprayed Thermal Barrier Coatings Produced with Varied Suspension Parameters

Curry

VanEvery²,

Snyder³

et al. 2015

Coatings

View full text Add to dashboard Cite

show abstract

“…Suspension plasma spraying (SPS) coatings can be produced with high levels of porosity that are not normally achievable with APS or EB-PVD coatings [18]. The amount and size of the SPS porosity allows for the reduction in coating thermal conductivity through decreased phonon transport and decreased IR radiation transmittance.…”

Section: Introductionmentioning

confidence: 99%

Thermal Conductivity Analysis and Lifetime Testing of Suspension Plasma-Sprayed Thermal Barrier Coatings

Curry

VanEvery²,

Snyder³

et al. 2014

Coatings

117

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Suspension plasma spraying (SPS) has become an interesting method for the production of thermal barrier coatings for gas turbine components. The development of the SPS process has led to structures with segmented vertical cracks or column-like structures that can imitate strain-tolerant air plasma spraying (APS) or electron beam physical vapor deposition (EB-PVD) coatings. Additionally, SPS coatings can have lower thermal conductivity than EB-PVD coatings, while also being easier to produce. The combination of similar or improved properties with a potential for lower production costs makes SPS of great interest to the gas turbine industry. This study compares a number of SPS thermal barrier coatings (TBCs) with vertical cracks or column-like structures with the reference of segmented APS coatings. The primary focus has been on lifetime testing of these new coating systems. Samples were tested in thermo-cyclic fatigue at temperatures of 1100 °C for 1 h cycles. Additional testing was performed to assess thermal shock performance and erosion resistance. Thermal conductivity was also assessed for samples in their as-sprayed state, and the microstructures were investigated using SEM.

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“…8mol% YSZ powder with d 50 of 360nm (d 10 =230nm and d 90 =560nm) supplied by UCM Advanced Ceramics was used to achieve the aqueous suspensions. The solid loading of the suspension was fixed at 20wt.% according to published works by researchers at the Université de Limoges (France) [11][12][13][14][15] in which this value was found to be a good compromise between deposition efficiency and required plasma output. The Beycostat C213 with an amount of 2.1wt.% of YSZ powder was used for dispersing the particles in ethanol.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of hot corrosion of 8YSZ coatings elaborated by suspension plasma spraying

González-Hernández

Ageorges

López-Gómez

2017

J. Phys.: Conf. Ser.

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Quantification of void network architectures of suspension plasma-sprayed (SPS) yttria-stabilized zirconia (YSZ) coatings using Ultra-small-angle X-ray scattering (USAXS)

Cited by 39 publications

References 43 publications

Performance Testing of Suspension Plasma Sprayed Thermal Barrier Coatings Produced with Varied Suspension Parameters

Performance Testing of Suspension Plasma Sprayed Thermal Barrier Coatings Produced with Varied Suspension Parameters

Thermal Conductivity Analysis and Lifetime Testing of Suspension Plasma-Sprayed Thermal Barrier Coatings

Evaluation of hot corrosion of 8YSZ coatings elaborated by suspension plasma spraying

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