Influence of phase stability on the residual stress in partially stabilized zirconia TBC produced by plasma spray

Scardi, Paolo; Leoni, Matteo; Bertamini, L.

doi:10.1016/0257-8972(95)02496-4

Cited by 48 publications

(14 citation statements)

References 20 publications

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“…Experimental results in this work demonstrated that the transformation within the 8-YSZ coating occurred with increasing heat treatment above 800°C, and that this transformation was somewhat reversible upon the release of residual stresses. The monoclinic phase content increased to after 2x 1200°C + 2x 900°C heat treatment, which was much higher than the equilibrium content reported in other works [32,33], although this current study involved annealing at higher temperatures for shorter duration than in [32] (up to 1200°C for ~6 hours compared to 155°C for 48 hours). A key difference, however, was the much higher residual stresses in the YSZ coating in this current study of .…”

Section: Coupled Stress-and Temperature-induced Phase Changescontrasting

confidence: 67%

Unveiling residual stresses in air plasma spray coatings by digital image correlation

Croom

Bumgardner

2016

Extreme Mechanics Letters

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We report a new three-dimensional digital image correlation (3D-DIC) based method for in-situ probing of the residual stresses in air plasma spray (APS) coatings. The inherent surface texture and coloration of APS coatings enabled extraction of surface profiles with accuracies of better than. The residual stress history of a three-layer thermal barrier coating system (TBC) was obtained experimentally by 3D-DIC curvature measurements from 22 to 800°C coupled with a newly developed residual stress model for multilayered TBC systems. The residual stress in TBC systems was released in an observed linear trend through 800°C. Anomalous increases in curvature and residual stress upon heating between temperatures of 800°C and 900°C were partially caused by expansive tetragonal to monoclinic () phase transformation within the partially stabilized zirconia top coat. A coupled stress-temperature dependent mechanism was used to uncover the phase transformation induced stresses. The technique opens up new opportunities for monitoring the residual stress development in manufacturing and operation of coatings, thin films, and structures of dissimilar materials.

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Section: Coupled Stress-and Temperature-induced Phase Changescontrasting

confidence: 67%

Unveiling residual stresses in air plasma spray coatings by digital image correlation

Croom

Bumgardner

2016

Extreme Mechanics Letters

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“…Measurements of residual stress determined using Raman spectroscopy were reported as $À5 MPa by Tanaka et al These results are consistent with the current measurements. Residual stress after heat treatment at 155°C for 48 h was reported to be À35 MPa by Scardi et al [3]. Teixeira et al [11] heat-treated their coatings at 1100°C for 48 h and reported a residual stress of $À110 MPa.…”

Section: Residual Stressesmentioning

confidence: 95%

“…As-sprayed residual stresses for atmospheric plasma-sprayed YSZ on bond-coated superalloy substrates were reported to be $10 MPa, $15 MPa and $38 MPa by Scardi et al [3], Matejicek et al [8], and Teixeira et al [11], respectively. Measurements of residual stress determined using Raman spectroscopy were reported as $À5 MPa by Tanaka et al These results are consistent with the current measurements.…”

Section: Residual Stressesmentioning

confidence: 95%

“…Several methods for the determination of residual stresses in plasma-sprayed TBC have been developed, including material removal processes [1], substrate curvature measurements [2][3][4][5], diffraction techniques [6][7][8][9][10][11][12][13][14][15][16], spectroscopic techniques [17][18][19][20][21] and modeling [22][23][24][25][26]. Hole drilling methods allow for the discrete determination of stresses through the coating as material is removed.…”

Section: Introductionmentioning

confidence: 99%

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Through-thickness determination of phase composition and residual stresses in thermal barrier coatings using high-energy X-rays

2010

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“…First, data related to standard lamellar, porous, and micro-cracked microstructure, classically obtained by APS deposition, have been collected. This type of APS coating has been extensively investigated, and a large number of various studies are available [1][2][3][4][5][6][7][8][9][10][11]. As shown on Fig.…”

Section: Process and Coatings Microstructurementioning

confidence: 99%

Mechanical and Thermo-physical Properties of Plasma-Sprayed Thermal Barrier Coatings: A Literature Survey

et al. 2017

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Proton, Fabrice Crabos, et al.. Mechanical and thermo-physical properties of plasma-sprayed thermal barrier coatings: a literature survey.OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible.Abstract Atmospheric plasma-sprayed thermal barrier coatings (APS TBCs) have been studied from an extensive review of the dedicated literature. A large number of data have been collected and compared, versus deposition parameters and/or measurement methods, and a comparison was made between two different microstructures: standard APS coatings and segmented coatings. Discussion is focused on the large scattering of results reported in the literature even for a given fabrication procedure. This scattering strongly depends on the methods of measurement as expected, but also-for a given method-on the specific conditions implemented for the considered experimental investigation. Despite the important scattering, general trends for the correlation of properties to microstructure and process parameters can be derived. The failure modes of TBC systems were approached through the evolution of cracking and spalling at various life fractions.

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Influence of phase stability on the residual stress in partially stabilized zirconia TBC produced by plasma spray

Cited by 48 publications

References 20 publications

Unveiling residual stresses in air plasma spray coatings by digital image correlation

Unveiling residual stresses in air plasma spray coatings by digital image correlation

Through-thickness determination of phase composition and residual stresses in thermal barrier coatings using high-energy X-rays

Mechanical and Thermo-physical Properties of Plasma-Sprayed Thermal Barrier Coatings: A Literature Survey

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