Deformation behavior of plasma-sprayed thick thermal barrier coatings

Rejda, Ed F.; Socie, D. F.; Itoh, Takamoto

doi:10.1016/s0257-8972(98)00843-3

Cited by 59 publications

(41 citation statements)

References 6 publications

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“…One, rumpling distortion occurs primarily at elevated temperature; two, the TBC can accommodate rumpling distortion at the maximum temperature by its well-documented ability to creep [15,37,38] and three, rumpling distortion significantly damages the TBC only upon cooling. The 24-h cycle tests lack a sufficient number of cooling events to damage the TBC before the TGO separates from the bond coat due to increasing strain energy related to the high stress [16,28,39] and steadily increasing thickness.…”

Section: Discussionmentioning

confidence: 99%

Damage evolution in an electron beam physical vapor deposited thermal barrier coating as a function of cycle temperature and time

Sridharan

Xie

Jordan

et al. 2005

Materials Science and Engineering: A

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Section: Discussionmentioning

confidence: 99%

Damage evolution in an electron beam physical vapor deposited thermal barrier coating as a function of cycle temperature and time

Sridharan

Xie

Jordan

et al. 2005

Materials Science and Engineering: A

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“…Thermal barrier coatings such as zirconia have been used to protect turbine blades and combustion chambers for many years (Ref [1][2][3][4][5]. These coatings have been developed for a long while, but still the service life needs to be extended to longer lives and made more predictable.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Creep Behavior of Plasma-Sprayed Yttria Stabilized Zirconia Thermal Barrier Coatings

2008

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The purpose of this study was to determine the creep/sintering characteristics of thermally sprayed zirconia coatings and attempt to understand the influence of microstructure on the creep resistance of deposits. The major modification, compared with more typical practice, was employment of a new powder feedstock with agglomerated sub-micron size particles (Nanox), which is compared to one of the best commercially available powders (HOSP). Thick plasma-sprayed coatings were prepared and their physical and mechanical properties were characterized. Creep/sintering experiments were then conducted to investigate the response of the materials when exposed to high temperatures under load. The results showed that it could be possible to correlate the splat thickness to the creep behavior of the coatings.

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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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Deformation behavior of plasma-sprayed thick thermal barrier coatings

Cited by 59 publications

References 6 publications

Damage evolution in an electron beam physical vapor deposited thermal barrier coating as a function of cycle temperature and time

Damage evolution in an electron beam physical vapor deposited thermal barrier coating as a function of cycle temperature and time

Microstructure and Creep Behavior of Plasma-Sprayed Yttria Stabilized Zirconia 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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