@article{Chen:2016:10.1016/j.jeurceramsoc.2016.10.002,
author = {Chen, Z and Wang, X and Brandon, N and Atkinson, A},
doi = {10.1016/j.jeurceramsoc.2016.10.002},
journal = {Journal of the European Ceramic Society},
pages = {1031--1038},
title = {Analysis of spherical indentation of porous ceramic films},
url = {http://dx.doi.org/10.1016/j.jeurceramsoc.2016.10.002},
volume = {37},
year = {2016}
}

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TY  - JOUR
AB  - 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.
AU  - Chen,Z
AU  - Wang,X
AU  - Brandon,N
AU  - Atkinson,A
DO  - 10.1016/j.jeurceramsoc.2016.10.002
EP  - 1038
PY  - 2016///
SN  - 1873-619X
SP  - 1031
TI  - Analysis of spherical indentation of porous ceramic films
T2  - Journal of the European Ceramic Society
UR  - http://dx.doi.org/10.1016/j.jeurceramsoc.2016.10.002
UR  - http://hdl.handle.net/10044/1/41369
VL  - 37
ER  - 

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