Optimized sol–gel thermal barrier coatings for long-term cyclic oxidation life

Pin, Lisa; Vidal, Vanessa; Blas, F.; Ansart, Florence; Duluard, Sandrine Nathalie; Bonino, Jean-Pierre; Maoult, Yannick Le; Lours, Philippe

doi:10.1016/j.jeurceramsoc.2013.10.013

Cited by 15 publications

(17 citation statements)

References 26 publications

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“…x Y 0.0975-x Zr 1 -0.092-x O 1.951-2x (Ln ' = Eu, Er or Dy) with distinct emissions wavelengths were shaped by a dip-coating process previously developed [14,15].…”

Section: Deposition Of Tbc Sensorsmentioning

confidence: 99%

“…8.b). The isotropic nature of the resulting porosity is believed to provide a good balance between thermal insulation and thermomechanical strength [13,14,44].…”

Section: Characterization Of a Multilayer Tbc Sensor Prototypementioning

confidence: 99%

“…This cost effective process allows one to deposit 9.75 mol% porous YSZ TBCs presenting the metastable t' phase with performance under cyclic oxidation comparable to that of EB-PVD coatings [13,14]. The easy composition control offered by the technique has already generated interest for manufacturing some high purity YSZ:Er and YSZ:Sm phosphor coatings and powders [15].…”

Section: Introductionmentioning

confidence: 99%

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Feasibility of luminescent multilayer sol-gel thermal barrier coating manufacturing for future applications in through-thickness temperature gradient sensing

Copin

Sentenac

Maoult

et al. 2014

Surface and Coatings Technology

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a b s t r a c t a r t i c l e i n f o Available online xxxx Keywords: Thermal barrier coating Sol-gel Luminescence Phosphor SensorThis paper investigates the feasibility of manufacturing sol-gel multilayer thermal barrier coatings (TBC) functionalized with different lanthanide ions Ln 3+ having distinct photo-luminescence emission wavelengths (Ln = Sm, Eu, Dy, Er, Tm) for future applications in temperature gradient sensing. Ln 3+ doped 9.75 mol% yttria stabilized zirconia (YSZ) powders were produced to study the effect of activator concentration on luminescence intensity and host matrix crystal structure. Self-quenching was found to limit the maximum signal-to-noise ratio achievable with Sm 3+ , Dy 3+ , Er 3+ and Tm 3+ activators, which was not the case for Eu 3+ in the 1-10 mol% range. The increase in activator was found to affect the crystal structure of YSZ. A solution was proposed that suppressed this effect while significantly increasing the luminescence intensity of all activators. Finally a TBC sensor prototype integrating Eu 3+ , Er 3+ and Dy 3+ doped layers distributed throughout the thickness was successfully deposited by a dip-coating sol-gel process and showed promising through-thickness luminescence sensing capabilities.

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“…x Y 0.0975-x Zr 1 -0.092-x O 1.951-2x (Ln ' = Eu, Er or Dy) with distinct emissions wavelengths were shaped by a dip-coating process previously developed [14,15].…”

Section: Deposition Of Tbc Sensorsmentioning

confidence: 99%

“…8.b). The isotropic nature of the resulting porosity is believed to provide a good balance between thermal insulation and thermomechanical strength [13,14,44].…”

Section: Characterization Of a Multilayer Tbc Sensor Prototypementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Feasibility of luminescent multilayer sol-gel thermal barrier coating manufacturing for future applications in through-thickness temperature gradient sensing

Copin

Sentenac

Maoult

et al. 2014

Surface and Coatings Technology

Self Cite

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“…Yttria Stabilized Zirconia (YSZ) TBCs integrating a pre-determined delamination area at the substrate/TBC interface were prepared by a dip-coating process developed in previous works [10,11]. The substrates used for the depositions were 15mmx15mmx4mm Nicrofer 6025HT nickel based alloy coupons.…”

Section: Deposition Of Tbcs With Pre-calibrated Delamination Defectsmentioning

confidence: 99%

Comparison of IR Thermography and Reflectance-Enhanced Photoluminescence for early Quantitative Diagnostic of Thermal Barrier Coatings Spallation

Copin¹,

Maoult²,

Sentenac³

et al. 2014

Proceedings of the 2014 International Conference on Quantitative InfraRed Thermography

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Spallation of Thermal Barrier Coatings (TBCs) in gas turbines is the result of the insidious initiation and propagation of microcracks at the interface with the substrate. This temperature driven mechanism is difficult to detect in its early stage and the difficulty of determining accurately the interface temperature hinders the development of reliable lifetime prediction models. In this work two non destructive diagnostic methods based on IR thermography and photoluminescence are compared for early damaging assessment of TBCs prepared by a sol-gel route containing precalibrated delaminated areas and integrating a Eu 3+ doped photoluminescent layer at the interface with the substrate. The potential of the later method for through thickness temperature sensing is also discussed.

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“…Thermal barrier coatings (TBCs) have been widely used in the gas turbine engines to protect the metal components performing in high temperature, oxidative, and hot corrosive environment [1,2]. The common TBC system consists of a ceramic top coat layer, a metallic bond coat layer, thermal grown oxide (TGO) layer and the alloy substrate [3].…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of YAG-Al<sub>2</sub>O<sub>3</sub> Coatings Toughened by Pt Nano-Particles

Wang¹

2018

NSNM

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Optimized sol–gel thermal barrier coatings for long-term cyclic oxidation life

Abstract: OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible.

Cited by 15 publications

References 26 publications

Feasibility of luminescent multilayer sol-gel thermal barrier coating manufacturing for future applications in through-thickness temperature gradient sensing

Feasibility of luminescent multilayer sol-gel thermal barrier coating manufacturing for future applications in through-thickness temperature gradient sensing

Comparison of IR Thermography and Reflectance-Enhanced Photoluminescence for early Quantitative Diagnostic of Thermal Barrier Coatings Spallation

Oxidation Behavior of YAG-Al<sub>2</sub>O<sub>3</sub> Coatings Toughened by Pt Nano-Particles

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Optimized sol–gel thermal barrier coatings for long-term cyclic oxidation life

Abstract: OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible.

Cited by 15 publications

References 26 publications

Feasibility of luminescent multilayer sol-gel thermal barrier coating manufacturing for future applications in through-thickness temperature gradient sensing

Feasibility of luminescent multilayer sol-gel thermal barrier coating manufacturing for future applications in through-thickness temperature gradient sensing

Comparison of IR Thermography and Reflectance-Enhanced Photoluminescence for early Quantitative Diagnostic of Thermal Barrier Coatings Spallation

Oxidation Behavior of YAG-Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; Coatings Toughened by Pt Nano-Particles

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Oxidation Behavior of YAG-Al<sub>2</sub>O<sub>3</sub> Coatings Toughened by Pt Nano-Particles