Thermal barrier coating systems — analysis of nanoindentation curves

Zotov, Ν.; Bartsch, Marion; Eggeler, Gunther

doi:10.1016/j.surfcoat.2009.02.008

Cited by 52 publications

(27 citation statements)

References 58 publications

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“…where the elastic moduli of the coatings and the substrates E c = 100 GPa and E s = 200 GPa were taken [16,20], respectively. The normal stress σ i and the shear stress τ i at the interface for the coatings can be calculated by Eqs.…”

Section: Transverse Crackmentioning

confidence: 99%

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Thickness-dependent fracture characteristics of ceramic coatings bonded on the alloy substrates

Liang

Xie

et al. 2014

Surface and Coatings Technology

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Section: Transverse Crackmentioning

confidence: 99%

“…The elastic modulus E and the Poisson's ratio ν are respectively E c = 100 GPa, ν c = 0.2 for the coatings [16,17], and E s = 200 GPa, ν s = 0.3 for the substrates [16,20].…”

Section: S1 S1mentioning

confidence: 99%

Thickness-dependent fracture characteristics of ceramic coatings bonded on the alloy substrates

Liang

Xie

et al. 2014

Surface and Coatings Technology

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“…In service, crack nucleation and propagation gradually occurs due to oxidation and mismatch stresses, which eventually results in delamination and spallation of coating [2,3] . Therefore, to study failure mechanisms of TBCs, a lot of techniques have been developed such as acoustic emission (AE) [4] , digital image correlation [5][6][7] , photoluminescence piezospectroscopy [8][9][10] , and indentation methods [6,11] . Among these methods, the AE technique is generally used to identify the evolution of internal and external damage prior to failure in structural and functional materials under loading.…”

Section: Introductionmentioning

confidence: 99%

Acoustic emission analysis on tensile failure of air plasma-sprayed thermal barrier coatings

Yao

Dai

Mao

et al. 2012

Surface and Coatings Technology

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An acoustic emission technique was used to monitor the cracking behavior and fracture process of thermal barrier coatings subjected to tensile loading. Acoustic emission signals were extracted and preformed by fast Fourier transform, and their characteristic frequency spectrums and dominant bands were obtained to reveal fracture modes. Three different characteristic frequency bands were confirmed, corresponding to substrate deformation, surface vertical cracking and interface delamination, with the aid of scanning electronic microscopy observations. A map of the tensile failure mechanism of air plasma-sprayed thermal barrier coatings was HighlightsWe established several good correlations between AE data and fracture modes.The correlations can be utilized to reveal cracking profile and coating failure.A tensile failure mechanism of coating system was established.Fracture strength of thermal barrier coating has been obtained by this method.The method has a large advantage to study the failure of coating/film materials.

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“…The techniques in the first group are mechanical loading methods based on the direct measurement of the deformation resistance of the test material. For example, these methods can involve the bending test of a coating system specimen (Ref [1][2][3][4][5][6][7][8], the bending test of a freestanding coating specimen ( , the tension or compression test of a coating system or a freestanding coating (Ref [12][13][14], and the indentation test on the coating ( Ref 4,[15][16][17][18]. 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.…”

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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Thermal barrier coating systems — analysis of nanoindentation curves

Cited by 52 publications

References 58 publications

Thickness-dependent fracture characteristics of ceramic coatings bonded on the alloy substrates

Thickness-dependent fracture characteristics of ceramic coatings bonded on the alloy substrates

Acoustic emission analysis on tensile failure of air plasma-sprayed thermal barrier coatings

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

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