Some Considerations of Determination of Residual Stresses and Young's Moduli in Ceramic Coatings
Journal
Journal of the American Ceramic Society
Journal Volume
74
Journal Issue
7
Pages
1646-1649
Date Issued
1991
Author(s)
Abstract
Residual stresses that develop during cooling of a ceramic coating/substrate strip are considered. Bending occurs because of an asymmetric stress distribution in the strip. In the presence of residual stresses, strains induced on the surfaces of the coating and the substrate are analyzed when (1) the coating?substrate interface exhibits a transition from a bonded to a debonded state, and (2) a bending moment is applied to straighten the strip. The result shows that both the residual stress and Young's modulus in the ceramic coating can be determined from the surface strains due to either interfacial debonding or strip straightening, Young's modulus of the substrate, and the thicknesses of the coating and the substrate. Copyright ? 1991, Wiley Blackwell. All rights reserved
Subjects
bending
coatings
stress
substrates
Young's modulus
Type
journal article