Journal ArticleDOI
Modelling of TBC system failure: Stress distribution as a function of TGO thickness and thermal expansion mismatch
TLDR
In this paper, a model of BC oxidation was developed based on Wagner's theory, which predicts a parabolic law for the growth of TGO scale, and the analysis of stress distribution in the system was performed.About:
This article is published in Engineering Failure Analysis.The article was published on 2006-04-01. It has received 160 citations till now. The article focuses on the topics: Thermal barrier coating & Superalloy.read more
Citations
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Journal ArticleDOI
Finite element analysis of stress distribution in thermal barrier coatings
TL;DR: A numerical simulation of crack development within APS TBC systems is presented in this article, revealing a small influence influence of both on the stress state in the thermal barrier coating system subjected to temperature loading.
Journal ArticleDOI
Defect engineering in development of low thermal conductivity materials: A review
TL;DR: In this article, the authors comprehensively reviewed the recent advances of reducing the thermal conductivity of potential thermal barrier coating materials by defect engineering and quantitatively estimated the mass and size mismatch between the defects and the host lattice.
Journal ArticleDOI
Simulation of the effect of material properties and interface roughness on the stress distribution in thermal barrier coatings using finite element method
TL;DR: In this paper, a Finite Element Model (FEM) was developed to evaluate the stresses induced by the thermal cycling in a typical plasma-sprayed thermal barrier coating system (TBCs), which takes into account the effects of thermal and mechanical properties, morphology of the top-coat/bond-coat interface and oxidation on the local stresses that are responsible for the microcrack nucleation during cooling.
Journal ArticleDOI
Effect of TGO Thickness on Thermal Cyclic Lifetime and Failure Mode of Plasma-Sprayed TBCs
TL;DR: In this paper, a gradient thermal cycling test was performed on atmospheric plasma-sprayed thermal barrier coatings (TBCs) with different thermally grown oxide (TGO) thicknesses.
References
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Journal ArticleDOI
Mechanisms controlling the durability of thermal barrier coatings
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.
Journal ArticleDOI
Beitrag zur Theorie des Anlaufvorgangs
TL;DR: The Mechanismus des Diffusionsvorgangs is still weitgehend unbekannt as discussed by the authors, i.e., the Diffusion of mindestens einem der beiden Bestandteile durch die Anlaufschicht is notwendig.
Journal ArticleDOI
Aluminum Ion Diffusion in Aluminum Oxide
A. E. Paladino,W. D. Kingery +1 more
TL;DR: In this article, the self-diffusion coefficient of aluminum in polycrystalline aluminum oxide over the range 1670° to 1905°C was determined, and diffusion couples were employed using aluminum•26 in oxide form as a radioactive tracer.
Journal ArticleDOI
The effect of heat treatment on the stiffness of zirconia top coats in plasma-sprayed TBCs
J. A. Thompson,T.W. Clyne +1 more
TL;DR: In this paper, the effects of top-coat stiffening on the development of stress within the TBC system during exposure to high temperature were investigated and significant changes were detected in the Young's modulus of the top coat as a result of the heat treatments.
Journal ArticleDOI
Mechanics-based scaling laws for the durability of thermal barrier coatings
TL;DR: In this paper, the basic scaling relations are identified and used to gain some understanding of the relative importance of the various mechanisms that arise for application scenarios with minimal thermal cycling, based on stresses that develop because of TGO growth strains in combination with thermal expansion misfit.