Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Analytical Modeling of Oxide Thickness Effects on Residual Stresses in Thermal Barrier Coatings

Published

Author(s)

C H. Hsueh, Lin-Sien H. Lum

Abstract

The effects of the thickness of the thermally grown oxide on residual thermal stresses in a plasma-sprayed thermal barrier coating were numerically simulated in Part I. In the tip region of a convex asperity, the residual stress normal to the interface, (alpha)y, in the ceramic top coat is tensile for a thin oxide but becomes compressive for a thick oxide. In the tip region of a concave asperity, (alpha)y in the ceramic top coat is compressive for a thin oxide and becomes less compressive for a thick oxide. The physical meaning of the above trend was qualitatively interpreted in the present study by using an analytical model of three concentric circles.
Citation
Scripta Materialia
Volume
42
Issue
No. 8

Keywords

asperities, finite element simulation, residual stresses, surface roughness, thermal barrier coatings, thermally grown

Citation

Hsueh, C. and Lum, L. (2000), Analytical Modeling of Oxide Thickness Effects on Residual Stresses in Thermal Barrier Coatings, Scripta Materialia (Accessed February 20, 2024)
Created April 1, 2000, Updated February 19, 2017