Analysis of spherical indentation of porous ceramic films
File(s)
Published version
Author(s)
Chen, Z
Wang, X
Brandon, N
Atkinson, A
Type
Journal Article
Abstract
Spherical indentation of a porous brittle La0.6Sr0.4Co0.2Fe0.8O3 ceramic film (porosity=39.7%) on a stiffer elastic Ce0.9Gd0.1O1.95 substrate is simulated by finite element modelling incorporating the Gurson model to account for densification. The simulated load-displacement curves, apparent elastic modulus E, indentation hardness H and densification profile are all in good agreement with experimental data for the film. The simulations show that E and H are not sensitive to film residual stress. However E is very sensitive to the indent depth-film thickness ratio f, although H is less so for f<0.3. The simulated dependence of E and H on f are highly consistent with experimental data, supporting the extrapolation of E and H measured for 0.1<f<0.3, to zero depth for good estimates of the film-alone properties. The inclusion of densification in the simulation makes only a small difference to E, but has a large influence on H as a function of indentation depth.
Date Issued
2016-10-15
Date Acceptance
2016-10-03
Citation
Journal of the European Ceramic Society, 2016, 37 (3), pp.1031-1038
ISSN
1873-619X
Publisher
Elsevier
Start Page
1031
End Page
1038
Journal / Book Title
Journal of the European Ceramic Society
Volume
37
Issue
3
Copyright Statement
© 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/).
(http://creativecommons.org/licenses/by/4.0/).
License URL
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (E
Grant Number
EP/M014045/1
EP/L019469/1
Subjects
Science & Technology
Technology
Materials Science, Ceramics
Materials Science
Porous ceramic film
Indentation
Finite element modelling
Deformation
Mechanical properties
MECHANICAL-PROPERTIES
NANOINDENTATION
HARDNESS
SUBSTRATE
TOUGHNESS
MODULUS
DEPTH
Materials
0912 Materials Engineering
Publication Status
Published