Analytical modeling of oxide thickness effects on residual stresses in thermal barrier coatings
Journal
Scripta Materialia
Journal Volume
42
Journal Issue
8
Pages
781-787
Date Issued
2000
Author(s)
Abstract
A study was carried out to explore the physical meaning of the trend of the stress state of concave asperity (£my) in the ceramic top coat with the variation of the thermally grown oxide (TGO) thickness. This objective was met by using a simple analytical model of three consecutive circles. First, the residual thermal stresses in the three-concentric-circles model were derived. Following this, the results for residual radial stresses at the top coat/TGO and the TGO/bond coat interfaces were obtained as functions of the TGO thickness.
Type
journal article