Miniaturized bend tests on partially stabilized EB-PVD ZrO2 thermal barrier coatings

Pfeiffer, Carolin; Affeldt, E.; Göken, Mathias

doi:10.1016/j.surfcoat.2010.11.047

Cited by 16 publications

(6 citation statements)

References 29 publications

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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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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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“…Other techniques that have been utilized to monitor the mechanical response of coatings during in situ examination include AE [55,56] and DIC systems [57,58]. During the deformation and cracking process, AE signals are developed by the elastic stress waves generated inside the material, which are detected by AE sensors.…”

Section: In Situ Assessment Techniquesmentioning

confidence: 99%

A Review on In Situ Mechanical Testing of Coatings

et al. 2022

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Real-time evaluation of materials’ mechanical response is crucial to further improve the performance of surfaces and coatings because the widely used post-processing evaluation techniques (e.g., fractography analysis) cannot provide deep insight into the deformation and damage mechanisms that occur and changes in coatings’ material corresponding to the dynamic thermomechanical loading conditions. The advanced in situ examination methods offer deep insight into mechanical behavior and material failure with remarkable range and resolution of length scales, microstructure, and loading conditions. This article presents a review on the in situ mechanical testing of coatings under tensile and bending examinations, highlighting the commonly used in situ monitoring techniques in coating testing and challenges related to such techniques.

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“…Aging process of samples (e.g. [22][23][24][25]) in high temperature of about 1000 0 C results in increasing the TGO layer thickness in the interface between the BC and TC. This changes significantly strength parameters and degradation resistance of the whole TBC system.…”

Section: Current State Of Art Of the Tbc Testingmentioning

confidence: 99%

Experimental and Numerical Investigations of TBC Behaviour after Aging, Subjected to Tension and Bending<sup></sup>

Sadowski

Golewski

2014

SSP

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Thermal Barrier Coatings (TBCs) have been extensively used in aircraft engines to improve durability and performance. They protect critical engine parts such as blades and combustion chambers, which are exposed to high temperatures and corrosive environment.Testing of coated metallic alloys, subjected to ageing process, allows determination of the TBCs properties. In this paper we performed 2 tests: uniaxial tension and bending. The aging of samples was carried out in 1000°C for times: 48h, 89h, 185h and 353h. Thermally Grown Oxide (TGO) layer thickness (SEM observations) and the strain level corresponding to damage of the TBCs were determined experimentally.The experimental results were used to build numerical model in Abaqus program. Brittle cracking damage model was applied to describe of the TBC layer degradation. Surface based cohesive behavior was used to model delamination of the interface between a bond coat (BC) and a top coat (TC).The proposed numerical model describes with high accuracy experimental results.

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Miniaturized bend tests on partially stabilized EB-PVD ZrO2 thermal barrier coatings

Cited by 16 publications

References 29 publications

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

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

A Review on In Situ Mechanical Testing of Coatings

Experimental and Numerical Investigations of TBC Behaviour after Aging, Subjected to Tension and Bending<sup></sup>

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