Effects of substrate curvature radius, deposition temperature and coating thickness on the residual stress field of cylindrical thermal barrier coatings
TLDR
Wang et al. as mentioned in this paper analyzed the residual stress field in three different types of TBCs with cylindrical geometry and found that the curvature radius significantly affects the distributions of radial and hoop residual stresses.Abstract:
In a thermal barrier coating (TBC) system with cylindrical geometry, the position of coating plays an important role in the distribution of residual stress. In this paper, the residual stress field in three different types of TBCs with cylindrical geometry has been analyzed. The main focus is on the effects of substrate curvature radius, deposition temperature and coating thickness on the residual stress distribution during a deposition process. The results show that the substrate curvature radius significantly affects the distributions of radial and hoop residual stresses, which are in good agreement with experimental measurements by photo-stimulated luminescence piezospectroscopy (Wang et al., Acta Mater., 2009, 57(1):182–195). The maximum radial residual stress locates closely to the coating/thermal grown oxide interface. However, the maximum hoop residual stress lies in the thermal grown oxide layer, which is much more than other three layers and presents a strong stress singularity along the thickness direction.read more
Citations
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Evaluation of microhardness, fracture toughness and residual stress in a thermal barrier coating system: A modified Vickers indentation technique
TL;DR: The evolution of microhardness, fracture toughness and residual stress of an air plasma-sprayed thermal barrier coating system under thermal cycles was investigated by a modified Vickers indentation instrument coupled with three kinds of indentation models.
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Influences of interface morphology and thermally grown oxide thickness on residual stress distribution in thermal barrier coating system
Q.M. Yu,Huashan Zhou,Lu Wang +2 more
TL;DR: In this article, a complicated cosine curve with gradually increasing amplitude was used to simulate interface morphologies between layers so as to study the residual stress behavior during the cooling process in air plasma spraying TBC system by finite element method.
Journal ArticleDOI
Effect of substrate curvature on residual stresses and failure modes of an air plasma sprayed thermal barrier coating system
Dong Liu,M. Seraffon,M. Seraffon,Peter E J Flewitt,Nigel J. Simms,John Nicholls,David Stafford Rickerby +6 more
TL;DR: In this article, a set of aerofoil shaped air plasma sprayed thermal barrier coated (APS-TBC) specimens were adopted to investigate the stress distributions in the ceramic top coat (TC) and the thermally grown oxide (TGO), the mechanism of local crack generation and propagation at the TC/BC (bond coat) interface.
Journal ArticleDOI
Effect of substrate curvature on the evolution of microstructure and residual stresses in EBPVD-TBC
TL;DR: In this article, a set of Ni-based single crystal superalloy aero-blade sections with electron beam physical vapour deposited thermal barrier coating (EBPVD-TBC) were used to investigate the role of substrate curvature on the microstructure and the residual stresses in the coating system.
Journal ArticleDOI
Effect of material properties on residual stress distribution in thermal barrier coatings
Q.M. Yu,Qinchuan He +1 more
TL;DR: In this paper, the residual stress in the air plasma spraying (APS) TBC system during cooling process was numerically studied, and the influence of the material properties of each layer on residual stress was investigated.
References
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TL;DR: In this article, the structure, properties, and failure mechanisms of thermal barrier coatings (TBCs) are reviewed, together with a discussion of current limitations and future opportunities.
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TL;DR: In this paper, the authors present relationships between the durability, the governing material properties and salient morphological features of thermal barrier coatings and show that the failure is ultimately connected to the large residual compression in the thermally grown oxide through its roles in amplifying imperfections near the interface.
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An analytical model for predicting residual stresses in progressively deposited coatings Part 1: Planar geometry
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TL;DR: In this paper, an analytical model was developed to predict the residual stress distributions in progressively deposited coatings, such as those produced by thermal spraying, based on the concept of a misfit strain, caused by either the deposition stress (e.g. due to quenching of splats in thermal spraying) or by differential thermal contraction between substrate and coating during cooling.
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Concept of Functionally Graded Materials for Advanced Thermal Barrier Coating Applications
TL;DR: In this article, the concept of creating functionally graded metal-ceramic composite microstructures for thermal barrier coatings used in gas-turbine applications was explored, which offers the possibility of significantly improving the life and reliability of thermal barrier coating.