Numerical Parametric Analysis of Bond Coat Thickness Effect on Residual Stresses in Zirconia-Based Thermal Barrier Coatings

Numerical-based finite element investigation has been conducted to explain the effect of bond coat thickness on stress distribution in traditional and nanostructured yttria-stabilized zirconia (YSZ)-based thermal barrier coatings (TBC). Stress components have been determined to quantitatively analyz...

Full description

Saved in:
Bibliographic Details
Published in:High temperature materials and processes 2016-02, Vol.35 (2), p.201-207
Main Authors: Abbas, Musharaf, Hasham, Hasan Junaid, Baig, Yasir
Format: Article
Language:English
Subjects:
87.10.Kn
Alloys
bond coat
Bonding
Coating
Coating effects
Coatings
Compressive properties
finite element analysis
Microstructure
Residual stress
residual stresses
Stresses
thermal barrier coatings
Yttria stabilized zirconia
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Numerical-based finite element investigation has been conducted to explain the effect of bond coat thickness on stress distribution in traditional and nanostructured yttria-stabilized zirconia (YSZ)-based thermal barrier coatings (TBC). Stress components have been determined to quantitatively analyze the mechanical response of both kinds of coatings under the thermal shock effect. It has been found that maximum radial tensile and compressive stresses that exist at thermally grown oxide (TGO)/bond coat interface and within TGO respectively decrease with an increase in bond coat thickness. Effect of bond coat thickness on axial tensile stresses is not significant. However, axial compressive stresses that exist at the edge of the specimen near bond coat/substrate interface decrease appreciably with the increase in bond coat thickness. Residual stress profile as a function of bond coat thickness is further explained for comparative analysis of both coatings to draw some useful conclusions helpful in failure studies of TBCs.
ISSN:0334-6455
2191-0324
DOI:10.1515/htmp-2014-0185