Failure of thermal barrier coating systems under cyclic thermomechanical loading

Tzimas, Evangelos; Müllejans, Harald; Peteves, S. D.; Bressers, J.; Werner, Stefan

doi:10.1016/s1359-6454(00)00260-3

Cited by 136 publications

(48 citation statements)

References 31 publications

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“…However, studies on TMF behaviour of TBC systems reported in the literature are limited and differences in experimental procedure make the comparison of published results very difficult. Both, failure by TBC spallation of and fatigue failure of bond coat and base material have been reported [5,6], but systematic investigations on the type and details of failure are not available up to now. The present paper addresses the effect of high temperature dwell time on the failure mode and lifetime of APS TBCs under thermal cycling and TMF loadings.…”

Section: Introductionmentioning

confidence: 99%

TBCs for Gas Turbines under Thermomechanical Loadings: Failure Behaviour and Life Prediction

Beck

Trunova

Herzog³

et al. 2012

EPJ Web of Conferences

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Abstract. The present contribution gives an overview about recent research on a thermal barrier coating (TBC) system consisted of (i) an intermetallic MCrAlY-alloy Bondcoat (BC) applied by vacuum plasma spraying (VPS) and (ii) an Yttria Stabilised Zirconia (YSZ) top coat air plasma sprayed (APS) at Forschungszentrum Juelich, Institute of Energy and Climate Research (IEK-1). The influence of high temperature dwell time, maximum and minimum temperature on crack growth kinetics during thermal cycling of such plasma sprayed TBCs is investigated using infrared pulse thermography (IT), acoustic emission (AE) analysis and scanning electron microscopy. Thermocyclic life in terms of accumulated time at maximum temperature decreases with increasing high temperature dwell time and increases with increasing minimum temperature. AE analysis proves that crack growth mainly occurs during cooling at temperatures below the ductile-to-brittle transition temperature of the BC. Superimposed mechanical load cycles accelerate delamination crack growth and, in case of sufficiently high mechanical loadings, result in premature fatigue failure of the substrate. A life prediction model based on TGO growth kinetics and a fracture mechanics approach has been developed which accounts for the influence of maximum and minimum temperature as well as of high temperature dwell time with good accuracy in an extremely wide parameter range.

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Section: Introductionmentioning

confidence: 99%

TBCs for Gas Turbines under Thermomechanical Loadings: Failure Behaviour and Life Prediction

Beck

Trunova

Herzog³

et al. 2012

EPJ Web of Conferences

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“…Thermal barrier coatings (TBCs) are often used to protect metallic components from high temperature service environments [1][2][3][4][5][6]. Degradation of TBCs and the underlying substrate can be caused by many factors.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic TGO rumpling in EB-PVD thermal barrier coatings under in-phase thermomechanical loading

et al. 2011

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“…kagawa @ iis.u-tokyo.ac.jp (Y. Ka gawa). [3][4][5][6][7][8][9][10][11][12], and that these mechanisms often have competi ng dependencies on constituent material properties. In gen eral.…”

Section: Introductionmentioning

confidence: 99%

Measurement of interfacial shear mechanical properties in thermal barrier coating systems by a barb pullout method

et al. 2005

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Failure of thermal barrier coating systems under cyclic thermomechanical loading

Cited by 136 publications

References 31 publications

TBCs for Gas Turbines under Thermomechanical Loadings: Failure Behaviour and Life Prediction

TBCs for Gas Turbines under Thermomechanical Loadings: Failure Behaviour and Life Prediction

Anisotropic TGO rumpling in EB-PVD thermal barrier coatings under in-phase thermomechanical loading

Measurement of interfacial shear mechanical properties in thermal barrier coating systems by a barb pullout method

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