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Versagensmechanismen eines Modellsystems von Wärmedämmschichten (Failure mechanisms of a model system of thermal insulation layers)

Seiler, Philipp E. (2014) Versagensmechanismen eines Modellsystems von Wärmedämmschichten (Failure mechanisms of a model system of thermal insulation layers). Other thesis, Technical University of Braunschweig. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:89806)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)

Abstract

In the present work the failure mechanisms of thermal barrier coating systems are examined. These layer systems are used on highly stressed components in gas turbines to protect the substrate materials. The failure mechanisms of the thermal barrier coating systems could not be fully elucidated due to the complex interactions of different phenomena (e.g. creep, sintering, differential thermal expansion, diffusion and oxidation processes). For this reason, a simplified model system is presented, which offers the possibility to investigate two essential aspects of layer failure, the influence of the creep properties and the interface roughness.

In the present work finite element simulations of the model system are varied on the micro and mesoscale according to experimental test series. The crack initiation and the crack propagation are analyzed, from which a failure scenario of the model system is derived

Item Type: Thesis (Other)
Uncontrolled keywords: Thermal insulation layers; surface roughness; creep; failure; finite element method; crack propagation
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Amy Boaler
Date Deposited: 16 Aug 2021 12:07 UTC
Last Modified: 16 Aug 2021 12:07 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/89806 (The current URI for this page, for reference purposes)
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