Ceramic coatings: Effect of deposition method on damping and modulus of elasticity for yttria-stabilized zirconia

Patsias, Sophoclis; Tassini, N.; Lambrinou, Konstantina

doi:10.1016/j.msea.2006.04.129

Cited by 39 publications

(20 citation statements)

References 8 publications

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“…It is however interesting to note that, for a prescribed level of axial strain, the total damping capacity calculated by the FE model with uniform mass distribution is significantly higher than the one calculated by Eq. (8). The distributed inertia forces, in fact, give rise to higher and nonuniform axial stresses that remark ably enhance energy dissipation.…”

Section: Fig 10 C O M P a Ris O N B E Tw E E N A N A Ly Tic A L Andmentioning

confidence: 99%

“…(8) suggests that the damping capacity of the sys tem rapidly decays when Hs / 0 (r2 being at the denominator of Eq. (8)) and that it tends to zero at the limit when Hs -> oo. This trend is clearly shown by both analytical and numerical results in Fig.…”

Section: Fig 10 C O M P a Ris O N B E Tw E E N A N A Ly Tic A L Andmentioning

confidence: 99%

“…While low-thermal conductivity oxides, such as yttria-stabilized zirconia (YSZ) and more recently gadolinium zirconate, are commonly used as refractory TBC materials, there is a growing interest in developing multifunc tional configurations combining thermal protection and damping capabilities. Vibration damping is, in fact, critical for gas turbine blades that have to withstand high inertial stresses and repeated buffeting while operating at highly exacting temperatures and creep-fatigue conditions [4], Damping is usually provided by extrinsic damping elements, but there is also interest in assessing and simulating the inherent dissipation properties of common oxide coating materials [5][6][7][8][9][10]. While these studies have mostly focused on internal friction damping and its functional dependence on the material microstructural features of bulk or as-deposited oxides, recently devel oped multilayer coatings comprising thin platinum (Pt) layers embedded into a ceramic (YSZ) matrix [11] may offer new oppor tunities for improved damping.…”

Section: Introductionmentioning

confidence: 99%

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Vibration Damping of Thermal Barrier Coatings Containing Ductile Metallic Layers

Casadei

Bertoldi

Clarke

2014

Journal of Applied Mechanics

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This paper explores the vibration damping properties of thermal barrier coatings (TBCs) containing thin plastically deformable metallic layers embedded in an elastic ceramic matrix. We develop an elastic-plastic dynamical model to study how work hardening, yield strain, and elastic modulus o f the metal affect the macroscopic damping behavior of the coating. Finite element (FE) simulations validate the model and are used to estimate the damping capacity under axial and flexural vibration conditions. The model also pro vides an explanation for the widely observed nonlinear variation of the loss factor with strain in plasma-spayed TBCs. Furthermore, it facilitates the identification of multilayer configurations that maximize energy dissipation.

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Section: Fig 10 C O M P a Ris O N B E Tw E E N A N A Ly Tic A L Andmentioning

confidence: 99%

Section: Fig 10 C O M P a Ris O N B E Tw E E N A N A Ly Tic A L Andmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Vibration Damping of Thermal Barrier Coatings Containing Ductile Metallic Layers

Casadei

Bertoldi

Clarke

2014

Journal of Applied Mechanics

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“…The hard coating is usually prepared by air plasma spraying (APS) and electron beam-physical vapor deposition (EB-PVD) [4] and Stony's approach is commonly used to check the characteristics of coating [5]. Recent studies have shown that the hard coating will contribute to the increase of structural damping and the decrease of resonant stress [6,7].…”

Section: Introductionmentioning

confidence: 99%

Damping Optimization of Hard-Coating Thin Plate by the Modified Modal Strain Energy Method

Sun

Liu

2017

Coatings

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Due to the medium and small damping characteristics of the hard coating compared with viscoelastic materials, the classical modal strain energy (CMSE) method cannot be applied to the prediction of damping characteristics of hard-coating composite structure directly. In this study, the CMSE method was modified in order to be suitable for this calculation, and then the damping optimization of the hard-coating thin plate was carried out. First, the solution formula of modified modal strain energy (MMSE) method was derived and the relevant calculation procedure was proposed. Then, based on the principle that depositing the hard coating on the locations where modal strain energy is higher, the damping optimization method and procedure were presented. Next, a cantilever thin plate coated with Mg-Al hard coating was taken as an example to demonstrate the solution of the modal damping parameters for the composite plate. Finally, the optimization of coating location was studied according to the proposed method for the cantilever thin plate, and the effect of the coating area on the damping characteristics of hard-coating plate was also discussed.

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“…The techniques in the second group are the resonance vibration method which is based on the principle that the resonance frequency of a material depends on its elastic modulus. For example, the method can involve the vibrations of a coating system specimen or a freestanding coating ( Ref 4,[19][20][21][22][23]. In the third group are methods of the pulse-echo (Ref 4,24) which is based on the principle that the velocity of sound in a material depends on the elastic modulus of the material.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Accuracy of Young’s Moduli of Thermal Barrier Coatings Determined on the Basis of Composite Beam Theory

et al. 2014

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The YoungÕs modulus of thermal barrier coating (TBC) is an important mechanical property as it is required for calculating the parameters of material mechanics in the TBC system. In this study, we investigated the accuracy of the YoungÕs modulus of TBC calculated using the composite beam theory. Generally, both the YoungÕs modulus and the thickness of TBC are approximately one order of magnitude lower than those of the substrate. Consequently, the YoungÕs modulus of the TBC calculated on the basis of the composite beam theory is considerably sensitive to experimental errors. In order to improve the accuracy of the composite beam method, methods that make use of coating strain, substrate strain, or deflection were compared. The methods with low sensitivity to experimental errors were determined through sensitivity analysis. Further, the effectiveness of the methods with low sensitivity was confirmed experimentally.

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Ceramic coatings: Effect of deposition method on damping and modulus of elasticity for yttria-stabilized zirconia

Cited by 39 publications

References 8 publications

Vibration Damping of Thermal Barrier Coatings Containing Ductile Metallic Layers

Vibration Damping of Thermal Barrier Coatings Containing Ductile Metallic Layers

Damping Optimization of Hard-Coating Thin Plate by the Modified Modal Strain Energy Method

Evaluation of the Accuracy of Young’s Moduli of Thermal Barrier Coatings Determined on the Basis of Composite Beam Theory

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