Simple formulas for thermoelastic stresses in TBC coatings


Ciavarella, M., Decuzzi, P., Tagarelli, V.L. and Demelio, G.P. (2003) Simple formulas for thermoelastic stresses in TBC coatings. Journal of Thermal Stresses, 26, (5), 409-422.

Download

[img]
Preview
PDF - Post print
Download (607Kb)

Description/Abstract

Thin coatings on metallic substrates are extensively used in mechanical, aerospace, microelectronic, optical, and medical applications. Coatings affect the surface properties of the system, while bulk properties and strength primarily depend on the substrate. In coated components subjected to thermal cycling, differences in physical properties and chemical nature between constituent parts of coating and substrate can cause thermal stresses, atomic diffusion, and chemical interactions, which decrease high-temperature stability and actual strength of the system. In this article, the microstructure of a thermal barrier coating is briefly described; then, the temperature field inside the coating is calculated from a transient or a steady periodic state analysis; hence, thermomechanical stresses are analytically determined for a double-layer system with planar or axisymmetric geometry. The present analysis leads to new formulas with which temperature and stress fields can be calculated.

Item Type: Article
Related URLs:
Keywords: TBC; Thermoelastic Stresses; Thin Films
Subjects: T Technology
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences
ePrint ID: 23263
Date Deposited: 21 Mar 2006
Last Modified: 27 Mar 2014 18:12
URI: http://eprints.soton.ac.uk/id/eprint/23263

Actions (login required)

View Item View Item

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics